Duplicate from Alibaba-NLP/gte-Qwen2-1.5B-instruct

Co-authored-by: yanzhao <zyznull@users.noreply.huggingface.co>

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1_Pooling/config.json

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config.json

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modeling_qwen.py

@@ -0,0 +1,1429 @@
+# coding=utf-8
+# Copyright 2024 The Qwen team, Alibaba Group and the HuggingFace Inc. team. All rights reserved.
+#
+# This code is based on EleutherAI's GPT-NeoX library and the GPT-NeoX
+# and OPT implementations in this library. It has been modified from its
+# original forms to accommodate minor architectural differences compared
+# to GPT-NeoX and OPT used by the Meta AI team that trained the model.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+""" PyTorch Qwen2 model."""
+from transformers import Qwen2Config
+import inspect
+import math
+import os
+import warnings
+from typing import List, Optional, Tuple, Union
+
+import torch
+import torch.nn.functional as F
+import torch.utils.checkpoint
+from torch import nn
+from torch.nn import BCEWithLogitsLoss, CrossEntropyLoss, MSELoss
+
+from transformers.activations import ACT2FN
+from transformers.cache_utils import Cache, DynamicCache
+from transformers.modeling_attn_mask_utils import _prepare_4d_causal_attention_mask, _prepare_4d_causal_attention_mask_for_sdpa, _prepare_4d_attention_mask, _prepare_4d_attention_mask_for_sdpa
+from transformers.modeling_outputs import BaseModelOutputWithPast, CausalLMOutputWithPast, SequenceClassifierOutputWithPast
+from transformers.modeling_utils import PreTrainedModel
+from transformers.utils import (
+    add_start_docstrings,
+    add_start_docstrings_to_model_forward,
+    is_flash_attn_2_available,
+    is_flash_attn_greater_or_equal_2_10,
+    logging,
+    replace_return_docstrings,
+)
+
+
+if is_flash_attn_2_available():
+    from flash_attn import flash_attn_func, flash_attn_varlen_func
+    from flash_attn.bert_padding import index_first_axis, pad_input, unpad_input  # noqa
+
+    _flash_supports_window_size = "window_size" in list(inspect.signature(flash_attn_func).parameters)
+
+
+logger = logging.get_logger(__name__)
+
+
+_CHECKPOINT_FOR_DOC = "Qwen/Qwen2-7B-beta"
+_CONFIG_FOR_DOC = "Qwen2Config"
+
+QWEN2_PRETRAINED_MODEL_ARCHIVE_LIST = [
+    "Qwen/Qwen2-7B-beta",
+    # See all Qwen2 models at https://huggingface.co/models?filter=qwen2
+]
+
+
+# Copied from transformers.models.llama.modeling_llama._get_unpad_data
+def _get_unpad_data(attention_mask):
+    seqlens_in_batch = attention_mask.sum(dim=-1, dtype=torch.int32)
+    indices = torch.nonzero(attention_mask.flatten(), as_tuple=False).flatten()
+    max_seqlen_in_batch = seqlens_in_batch.max().item()
+    cu_seqlens = F.pad(torch.cumsum(seqlens_in_batch, dim=0, dtype=torch.int32), (1, 0))
+    return (
+        indices,
+        cu_seqlens,
+        max_seqlen_in_batch,
+    )
+
+
+# Copied from transformers.models.llama.modeling_llama.LlamaRMSNorm with Llama->Qwen2
+class Qwen2RMSNorm(nn.Module):
+    def __init__(self, hidden_size, eps=1e-6):
+        """
+        Qwen2RMSNorm is equivalent to T5LayerNorm
+        """
+        super().__init__()
+        self.weight = nn.Parameter(torch.ones(hidden_size))
+        self.variance_epsilon = eps
+
+    def forward(self, hidden_states):
+        input_dtype = hidden_states.dtype
+        hidden_states = hidden_states.to(torch.float32)
+        variance = hidden_states.pow(2).mean(-1, keepdim=True)
+        hidden_states = hidden_states * torch.rsqrt(variance + self.variance_epsilon)
+        return self.weight * hidden_states.to(input_dtype)
+
+
+# Copied from transformers.models.mistral.modeling_mistral.MistralRotaryEmbedding with Mistral->Qwen2
+class Qwen2RotaryEmbedding(nn.Module):
+    def __init__(self, dim, max_position_embeddings=2048, base=10000, device=None):
+        super().__init__()
+
+        self.dim = dim
+        self.max_position_embeddings = max_position_embeddings
+        self.base = base
+        inv_freq = 1.0 / (self.base ** (torch.arange(0, self.dim, 2, dtype=torch.int64).float().to(device) / self.dim))
+        self.register_buffer("inv_freq", inv_freq, persistent=False)
+
+        # Build here to make `torch.jit.trace` work.
+        self._set_cos_sin_cache(
+            seq_len=max_position_embeddings, device=self.inv_freq.device, dtype=torch.get_default_dtype()
+        )
+
+    def _set_cos_sin_cache(self, seq_len, device, dtype):
+        self.max_seq_len_cached = seq_len
+        t = torch.arange(self.max_seq_len_cached, device=device, dtype=torch.int64).type_as(self.inv_freq)
+
+        freqs = torch.outer(t, self.inv_freq)
+        # Different from paper, but it uses a different permutation in order to obtain the same calculation
+        emb = torch.cat((freqs, freqs), dim=-1)
+        self.register_buffer("cos_cached", emb.cos().to(dtype), persistent=False)
+        self.register_buffer("sin_cached", emb.sin().to(dtype), persistent=False)
+
+    def forward(self, x, seq_len=None):
+        # x: [bs, num_attention_heads, seq_len, head_size]
+        if seq_len > self.max_seq_len_cached:
+            self._set_cos_sin_cache(seq_len=seq_len, device=x.device, dtype=x.dtype)
+
+        return (
+            self.cos_cached[:seq_len].to(dtype=x.dtype),
+            self.sin_cached[:seq_len].to(dtype=x.dtype),
+        )
+
+
+# Copied from transformers.models.llama.modeling_llama.rotate_half
+def rotate_half(x):
+    """Rotates half the hidden dims of the input."""
+    x1 = x[..., : x.shape[-1] // 2]
+    x2 = x[..., x.shape[-1] // 2 :]
+    return torch.cat((-x2, x1), dim=-1)
+
+
+# Copied from transformers.models.mistral.modeling_mistral.apply_rotary_pos_emb
+def apply_rotary_pos_emb(q, k, cos, sin, position_ids, unsqueeze_dim=1):
+    """Applies Rotary Position Embedding to the query and key tensors.
+
+    Args:
+        q (`torch.Tensor`): The query tensor.
+        k (`torch.Tensor`): The key tensor.
+        cos (`torch.Tensor`): The cosine part of the rotary embedding.
+        sin (`torch.Tensor`): The sine part of the rotary embedding.
+        position_ids (`torch.Tensor`):
+            The position indices of the tokens corresponding to the query and key tensors. For example, this can be
+            used to pass offsetted position ids when working with a KV-cache.
+        unsqueeze_dim (`int`, *optional*, defaults to 1):
+            The 'unsqueeze_dim' argument specifies the dimension along which to unsqueeze cos[position_ids] and
+            sin[position_ids] so that they can be properly broadcasted to the dimensions of q and k. For example, note
+            that cos[position_ids] and sin[position_ids] have the shape [batch_size, seq_len, head_dim]. Then, if q and
+            k have the shape [batch_size, heads, seq_len, head_dim], then setting unsqueeze_dim=1 makes
+            cos[position_ids] and sin[position_ids] broadcastable to the shapes of q and k. Similarly, if q and k have
+            the shape [batch_size, seq_len, heads, head_dim], then set unsqueeze_dim=2.
+    Returns:
+        `tuple(torch.Tensor)` comprising of the query and key tensors rotated using the Rotary Position Embedding.
+    """
+    cos = cos[position_ids].unsqueeze(unsqueeze_dim)
+    sin = sin[position_ids].unsqueeze(unsqueeze_dim)
+    q_embed = (q * cos) + (rotate_half(q) * sin)
+    k_embed = (k * cos) + (rotate_half(k) * sin)
+    return q_embed, k_embed
+
+
+# Copied from transformers.models.mistral.modeling_mistral.MistralMLP with Mistral->Qwen2
+class Qwen2MLP(nn.Module):
+    def __init__(self, config):
+        super().__init__()
+        self.config = config
+        self.hidden_size = config.hidden_size
+        self.intermediate_size = config.intermediate_size
+        self.gate_proj = nn.Linear(self.hidden_size, self.intermediate_size, bias=False)
+        self.up_proj = nn.Linear(self.hidden_size, self.intermediate_size, bias=False)
+        self.down_proj = nn.Linear(self.intermediate_size, self.hidden_size, bias=False)
+        self.act_fn = ACT2FN[config.hidden_act]
+
+    def forward(self, x):
+        return self.down_proj(self.act_fn(self.gate_proj(x)) * self.up_proj(x))
+
+
+# Copied from transformers.models.llama.modeling_llama.repeat_kv
+def repeat_kv(hidden_states: torch.Tensor, n_rep: int) -> torch.Tensor:
+    """
+    This is the equivalent of torch.repeat_interleave(x, dim=1, repeats=n_rep). The hidden states go from (batch,
+    num_key_value_heads, seqlen, head_dim) to (batch, num_attention_heads, seqlen, head_dim)
+    """
+    batch, num_key_value_heads, slen, head_dim = hidden_states.shape
+    if n_rep == 1:
+        return hidden_states
+    hidden_states = hidden_states[:, :, None, :, :].expand(batch, num_key_value_heads, n_rep, slen, head_dim)
+    return hidden_states.reshape(batch, num_key_value_heads * n_rep, slen, head_dim)
+
+
+class Qwen2Attention(nn.Module):
+    """
+    Multi-headed attention from 'Attention Is All You Need' paper. Modified to use sliding window attention: Longformer
+    and "Generating Long Sequences with Sparse Transformers".
+    """
+
+    def __init__(self, config: Qwen2Config, layer_idx: Optional[int] = None):
+        super().__init__()
+        self.config = config
+        self.layer_idx = layer_idx
+        if layer_idx is None:
+            logger.warning_once(
+                f"Instantiating {self.__class__.__name__} without passing `layer_idx` is not recommended and will "
+                "to errors during the forward call, if caching is used. Please make sure to provide a `layer_idx` "
+                "when creating this class."
+            )
+
+        self.hidden_size = config.hidden_size
+        self.num_heads = config.num_attention_heads
+        self.head_dim = self.hidden_size // self.num_heads
+        self.num_key_value_heads = config.num_key_value_heads
+        self.num_key_value_groups = self.num_heads // self.num_key_value_heads
+        self.max_position_embeddings = config.max_position_embeddings
+        self.rope_theta = config.rope_theta
+        self.is_causal = True
+        self.attention_dropout = config.attention_dropout
+
+        if (self.head_dim * self.num_heads) != self.hidden_size:
+            raise ValueError(
+                f"hidden_size must be divisible by num_heads (got `hidden_size`: {self.hidden_size}"
+                f" and `num_heads`: {self.num_heads})."
+            )
+        self.q_proj = nn.Linear(self.hidden_size, self.num_heads * self.head_dim, bias=True)
+        self.k_proj = nn.Linear(self.hidden_size, self.num_key_value_heads * self.head_dim, bias=True)
+        self.v_proj = nn.Linear(self.hidden_size, self.num_key_value_heads * self.head_dim, bias=True)
+        self.o_proj = nn.Linear(self.num_heads * self.head_dim, self.hidden_size, bias=False)
+
+        self.rotary_emb = Qwen2RotaryEmbedding(
+            self.head_dim,
+            max_position_embeddings=self.max_position_embeddings,
+            base=self.rope_theta,
+        )
+
+    def forward(
+        self,
+        hidden_states: torch.Tensor,
+        attention_mask: Optional[torch.Tensor] = None,
+        position_ids: Optional[torch.LongTensor] = None,
+        past_key_value: Optional[Cache] = None,
+        output_attentions: bool = False,
+        use_cache: bool = False,
+        **kwargs,
+    ) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
+        if "padding_mask" in kwargs:
+            warnings.warn(
+                "Passing `padding_mask` is deprecated and will be removed in v4.37. Please make sure use `attention_mask` instead.`"
+            )
+        bsz, q_len, _ = hidden_states.size()
+
+        query_states = self.q_proj(hidden_states)
+        key_states = self.k_proj(hidden_states)
+        value_states = self.v_proj(hidden_states)
+
+        query_states = query_states.view(bsz, q_len, self.num_heads, self.head_dim).transpose(1, 2)
+        key_states = key_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
+        value_states = value_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
+
+        kv_seq_len = key_states.shape[-2]
+        if past_key_value is not None:
+            if self.layer_idx is None:
+                raise ValueError(
+                    f"The cache structure has changed since version v4.36. If you are using {self.__class__.__name__} "
+                    "for auto-regressive decoding with k/v caching, please make sure to initialize the attention class "
+                    "with a layer index."
+                )
+            kv_seq_len += past_key_value.get_usable_length(kv_seq_len, self.layer_idx)
+        cos, sin = self.rotary_emb(value_states, seq_len=kv_seq_len)
+        query_states, key_states = apply_rotary_pos_emb(query_states, key_states, cos, sin, position_ids)
+
+        if past_key_value is not None:
+            cache_kwargs = {"sin": sin, "cos": cos}  # Specific to RoPE models
+            key_states, value_states = past_key_value.update(key_states, value_states, self.layer_idx, cache_kwargs)
+
+        # repeat k/v heads if n_kv_heads < n_heads
+        key_states = repeat_kv(key_states, self.num_key_value_groups)
+        value_states = repeat_kv(value_states, self.num_key_value_groups)
+
+        attn_weights = torch.matmul(query_states, key_states.transpose(2, 3)) / math.sqrt(self.head_dim)
+
+        if attn_weights.size() != (bsz, self.num_heads, q_len, kv_seq_len):
+            raise ValueError(
+                f"Attention weights should be of size {(bsz, self.num_heads, q_len, kv_seq_len)}, but is"
+                f" {attn_weights.size()}"
+            )
+
+        if attention_mask is not None:
+            if attention_mask.size() != (bsz, 1, q_len, kv_seq_len):
+                raise ValueError(
+                    f"Attention mask should be of size {(bsz, 1, q_len, kv_seq_len)}, but is {attention_mask.size()}"
+                )
+
+            attn_weights = attn_weights + attention_mask
+
+        # upcast attention to fp32
+        attn_weights = nn.functional.softmax(attn_weights, dim=-1, dtype=torch.float32).to(query_states.dtype)
+        attn_weights = nn.functional.dropout(attn_weights, p=self.attention_dropout, training=self.training)
+        attn_output = torch.matmul(attn_weights, value_states)
+
+        if attn_output.size() != (bsz, self.num_heads, q_len, self.head_dim):
+            raise ValueError(
+                f"`attn_output` should be of size {(bsz, self.num_heads, q_len, self.head_dim)}, but is"
+                f" {attn_output.size()}"
+            )
+
+        attn_output = attn_output.transpose(1, 2).contiguous()
+        attn_output = attn_output.reshape(bsz, q_len, self.hidden_size)
+
+        attn_output = self.o_proj(attn_output)
+
+        if not output_attentions:
+            attn_weights = None
+
+        return attn_output, attn_weights, past_key_value
+
+
+class Qwen2FlashAttention2(Qwen2Attention):
+    """
+    Qwen2 flash attention module, following Qwen2 attention module. This module inherits from `Qwen2Attention`
+    as the weights of the module stays untouched. The only required change would be on the forward pass
+    where it needs to correctly call the public API of flash attention and deal with padding tokens
+    in case the input contains any of them. Additionally, for sliding window attention, we apply SWA only to the bottom
+    config.max_window_layers layers.
+    """
+
+    # Copied from transformers.models.llama.modeling_llama.LlamaFlashAttention2.__init__
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        # TODO: Should be removed once Flash Attention for RoCm is bumped to 2.1.
+        # flash_attn<2.1 generates top-left aligned causal mask, while what is needed here is bottom-right alignement, that was made default for flash_attn>=2.1. This attribute is used to handle this difference. Reference: https://github.com/Dao-AILab/flash-attention/releases/tag/v2.1.0.
+        # Beware that with flash_attn<2.1, using q_seqlen != k_seqlen (except for the case q_seqlen == 1) produces a wrong mask (top-left).
+        self._flash_attn_uses_top_left_mask = not is_flash_attn_greater_or_equal_2_10()
+
+    def forward(
+        self,
+        hidden_states: torch.Tensor,
+        attention_mask: Optional[torch.Tensor] = None,
+        position_ids: Optional[torch.LongTensor] = None,
+        past_key_value: Optional[Cache] = None,
+        output_attentions: bool = False,
+        use_cache: bool = False,
+        is_causal: bool = True,
+        **kwargs,
+    ):
+        if "padding_mask" in kwargs:
+            warnings.warn(
+                "Passing `padding_mask` is deprecated and will be removed in v4.37. Please make sure use `attention_mask` instead.`"
+            )
+
+            # overwrite attention_mask with padding_mask
+            attention_mask = kwargs.pop("padding_mask")
+        bsz, q_len, _ = hidden_states.size()
+
+        query_states = self.q_proj(hidden_states)
+        key_states = self.k_proj(hidden_states)
+        value_states = self.v_proj(hidden_states)
+
+        query_states = query_states.view(bsz, q_len, self.num_heads, self.head_dim).transpose(1, 2)
+        key_states = key_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
+        value_states = value_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
+
+        kv_seq_len = key_states.shape[-2]
+        if past_key_value is not None:
+            if self.layer_idx is None:
+                raise ValueError(
+                    f"The cache structure has changed since version v4.36. If you are using {self.__class__.__name__} "
+                    "for auto-regressive decoding with k/v caching, please make sure to initialize the attention class "
+                    "with a layer index."
+                )
+            kv_seq_len += past_key_value.get_usable_length(kv_seq_len, self.layer_idx)
+
+        # Because the input can be padded, the absolute sequence length depends on the max position id.
+        rotary_seq_len = max(kv_seq_len, position_ids[:, -1].max().item()) + 1
+        cos, sin = self.rotary_emb(value_states, seq_len=rotary_seq_len)
+
+        query_states, key_states = apply_rotary_pos_emb(query_states, key_states, cos, sin, position_ids)
+
+        use_sliding_windows = (
+            _flash_supports_window_size
+            and getattr(self.config, "sliding_window", None) is not None
+            and kv_seq_len > self.config.sliding_window
+            and self.config.use_sliding_window
+        )
+
+        if not _flash_supports_window_size:
+            logger.warning_once(
+                "The current flash attention version does not support sliding window attention, for a more memory efficient implementation"
+                " make sure to upgrade flash-attn library."
+            )
+
+        if past_key_value is not None:
+            # Activate slicing cache only if the config has a value `sliding_windows` attribute
+            cache_has_contents = past_key_value.get_seq_length(self.layer_idx) > 0
+            if (
+                getattr(self.config, "sliding_window", None) is not None
+                and kv_seq_len > self.config.sliding_window
+                and cache_has_contents
+            ):
+                slicing_tokens = 1 - self.config.sliding_window
+
+                past_key = past_key_value[self.layer_idx][0]
+                past_value = past_key_value[self.layer_idx][1]
+
+                past_key = past_key[:, :, slicing_tokens:, :].contiguous()
+                past_value = past_value[:, :, slicing_tokens:, :].contiguous()
+
+                if past_key.shape[-2] != self.config.sliding_window - 1:
+                    raise ValueError(
+                        f"past key must have a shape of (`batch_size, num_heads, self.config.sliding_window-1, head_dim`), got"
+                        f" {past_key.shape}"
+                    )
+
+                if attention_mask is not None:
+                    attention_mask = attention_mask[:, slicing_tokens:]
+                    attention_mask = torch.cat([attention_mask, torch.ones_like(attention_mask[:, -1:])], dim=-1)
+
+            cache_kwargs = {"sin": sin, "cos": cos}  # Specific to RoPE models
+            key_states, value_states = past_key_value.update(key_states, value_states, self.layer_idx, cache_kwargs)
+
+        # repeat k/v heads if n_kv_heads < n_heads
+        key_states = repeat_kv(key_states, self.num_key_value_groups)
+        value_states = repeat_kv(value_states, self.num_key_value_groups)
+        dropout_rate = 0.0 if not self.training else self.attention_dropout
+
+        # In PEFT, usually we cast the layer norms in float32 for training stability reasons
+        # therefore the input hidden states gets silently casted in float32. Hence, we need
+        # cast them back in float16 just to be sure everything works as expected.
+        input_dtype = query_states.dtype
+        if input_dtype == torch.float32:
+            if torch.is_autocast_enabled():
+                target_dtype = torch.get_autocast_gpu_dtype()
+            # Handle the case where the model is quantized
+            elif hasattr(self.config, "_pre_quantization_dtype"):
+                target_dtype = self.config._pre_quantization_dtype
+            else:
+                target_dtype = self.q_proj.weight.dtype
+
+            logger.warning_once(
+                f"The input hidden states seems to be silently casted in float32, this might be related to"
+                f" the fact you have upcasted embedding or layer norm layers in float32. We will cast back the input in"
+                f" {target_dtype}."
+            )
+
+            query_states = query_states.to(target_dtype)
+            key_states = key_states.to(target_dtype)
+            value_states = value_states.to(target_dtype)
+
+        # Reashape to the expected shape for Flash Attention
+        query_states = query_states.transpose(1, 2)
+        key_states = key_states.transpose(1, 2)
+        value_states = value_states.transpose(1, 2)
+
+        attn_output = self._flash_attention_forward(
+            query_states,
+            key_states,
+            value_states,
+            attention_mask,
+            q_len,
+            dropout=dropout_rate,
+            use_sliding_windows=use_sliding_windows,
+            is_causal=is_causal
+        )
+
+        attn_output = attn_output.reshape(bsz, q_len, self.hidden_size).contiguous()
+        attn_output = self.o_proj(attn_output)
+
+        if not output_attentions:
+            attn_weights = None
+
+        return attn_output, attn_weights, past_key_value
+
+    def _flash_attention_forward(
+        self,
+        query_states,
+        key_states,
+        value_states,
+        attention_mask,
+        query_length,
+        dropout=0.0,
+        softmax_scale=None,
+        use_sliding_windows=False,
+        is_causal=True,
+    ):
+        """
+        Calls the forward method of Flash Attention - if the input hidden states contain at least one padding token
+        first unpad the input, then computes the attention scores and pad the final attention scores.
+
+        Args:
+            query_states (`torch.Tensor`):
+                Input query states to be passed to Flash Attention API
+            key_states (`torch.Tensor`):
+                Input key states to be passed to Flash Attention API
+            value_states (`torch.Tensor`):
+                Input value states to be passed to Flash Attention API
+            attention_mask (`torch.Tensor`):
+                The padding mask - corresponds to a tensor of size `(batch_size, seq_len)` where 0 stands for the
+                position of padding tokens and 1 for the position of non-padding tokens.
+            dropout (`int`, *optional*):
+                Attention dropout
+            softmax_scale (`float`, *optional*):
+                The scaling of QK^T before applying softmax. Default to 1 / sqrt(head_dim)
+            use_sliding_windows (`bool`, *optional*):
+                Whether to activate sliding window attention.
+        """
+        if not self._flash_attn_uses_top_left_mask:
+            causal = is_causal
+        else:
+            # TODO: Remove the `query_length != 1` check once Flash Attention for RoCm is bumped to 2.1. For details, please see the comment in LlamaFlashAttention2 __init__.
+            causal = is_causal and query_length != 1
+
+        # Decide whether to use SWA or not by layer index.
+        if use_sliding_windows and self.layer_idx >= self.config.max_window_layers:
+            use_sliding_windows = False
+
+        # Contains at least one padding token in the sequence
+        if attention_mask is not None:
+            batch_size = query_states.shape[0]
+            query_states, key_states, value_states, indices_q, cu_seq_lens, max_seq_lens = self._upad_input(
+                query_states, key_states, value_states, attention_mask, query_length
+            )
+
+            cu_seqlens_q, cu_seqlens_k = cu_seq_lens
+            max_seqlen_in_batch_q, max_seqlen_in_batch_k = max_seq_lens
+
+            if not use_sliding_windows:
+                attn_output_unpad = flash_attn_varlen_func(
+                    query_states,
+                    key_states,
+                    value_states,
+                    cu_seqlens_q=cu_seqlens_q,
+                    cu_seqlens_k=cu_seqlens_k,
+                    max_seqlen_q=max_seqlen_in_batch_q,
+                    max_seqlen_k=max_seqlen_in_batch_k,
+                    dropout_p=dropout,
+                    softmax_scale=softmax_scale,
+                    causal=causal,
+                )
+            else:
+                attn_output_unpad = flash_attn_varlen_func(
+                    query_states,
+                    key_states,
+                    value_states,
+                    cu_seqlens_q=cu_seqlens_q,
+                    cu_seqlens_k=cu_seqlens_k,
+                    max_seqlen_q=max_seqlen_in_batch_q,
+                    max_seqlen_k=max_seqlen_in_batch_k,
+                    dropout_p=dropout,
+                    softmax_scale=softmax_scale,
+                    causal=causal,
+                    window_size=(self.config.sliding_window, self.config.sliding_window),
+                )
+
+            attn_output = pad_input(attn_output_unpad, indices_q, batch_size, query_length)
+        else:
+            if not use_sliding_windows:
+                attn_output = flash_attn_func(
+                    query_states,
+                    key_states,
+                    value_states,
+                    dropout,
+                    softmax_scale=softmax_scale,
+                    causal=causal,
+                )
+            else:
+                attn_output = flash_attn_func(
+                    query_states,
+                    key_states,
+                    value_states,
+                    dropout,
+                    softmax_scale=softmax_scale,
+                    causal=causal,
+                    window_size=(self.config.sliding_window, self.config.sliding_window),
+                )
+
+        return attn_output
+
+    # Copied from transformers.models.mistral.modeling_mistral.MistralFlashAttention2._upad_input
+    def _upad_input(self, query_layer, key_layer, value_layer, attention_mask, query_length):
+        batch_size, kv_seq_len, num_heads, head_dim = key_layer.shape
+
+        # On the first iteration we need to properly re-create the padding mask
+        # by slicing it on the proper place
+        if kv_seq_len != attention_mask.shape[-1]:
+            attention_mask_num_tokens = attention_mask.shape[-1]
+            attention_mask = attention_mask[:, attention_mask_num_tokens - kv_seq_len :]
+
+        indices_k, cu_seqlens_k, max_seqlen_in_batch_k = _get_unpad_data(attention_mask)
+
+        key_layer = index_first_axis(key_layer.reshape(batch_size * kv_seq_len, num_heads, head_dim), indices_k)
+        value_layer = index_first_axis(value_layer.reshape(batch_size * kv_seq_len, num_heads, head_dim), indices_k)
+
+        if query_length == kv_seq_len:
+            query_layer = index_first_axis(
+                query_layer.reshape(batch_size * kv_seq_len, num_heads, head_dim), indices_k
+            )
+            cu_seqlens_q = cu_seqlens_k
+            max_seqlen_in_batch_q = max_seqlen_in_batch_k
+            indices_q = indices_k
+        elif query_length == 1:
+            max_seqlen_in_batch_q = 1
+            cu_seqlens_q = torch.arange(
+                batch_size + 1, dtype=torch.int32, device=query_layer.device
+            )  # There is a memcpy here, that is very bad.
+            indices_q = cu_seqlens_q[:-1]
+            query_layer = query_layer.squeeze(1)
+        else:
+            # The -q_len: slice assumes left padding.
+            attention_mask = attention_mask[:, -query_length:]
+            query_layer, indices_q, cu_seqlens_q, max_seqlen_in_batch_q = unpad_input(query_layer, attention_mask)
+
+        return (
+            query_layer,
+            key_layer,
+            value_layer,
+            indices_q,
+            (cu_seqlens_q, cu_seqlens_k),
+            (max_seqlen_in_batch_q, max_seqlen_in_batch_k),
+        )
+
+
+# Copied from transformers.models.mistral.modeling_mistral.MistralSdpaAttention with Mistral->Qwen2
+class Qwen2SdpaAttention(Qwen2Attention):
+    """
+    Qwen2 attention module using torch.nn.functional.scaled_dot_product_attention. This module inherits from
+    `Qwen2Attention` as the weights of the module stays untouched. The only changes are on the forward pass to adapt to
+    SDPA API.
+    """
+
+    # Adapted from Qwen2Attention.forward
+    def forward(
+        self,
+        hidden_states: torch.Tensor,
+        attention_mask: Optional[torch.Tensor] = None,
+        position_ids: Optional[torch.LongTensor] = None,
+        past_key_value: Optional[Cache] = None,
+        output_attentions: bool = False,
+        use_cache: bool = False,
+        is_causal: bool = False,
+    ) -> Tuple[torch.Tensor, Optional[torch.Tensor], Optional[Tuple[torch.Tensor]]]:
+        if output_attentions:
+            # TODO: Improve this warning with e.g. `model.config.attn_implementation = "manual"` once this is implemented.
+            logger.warning_once(
+                "Qwen2Model is using Qwen2SdpaAttention, but `torch.nn.functional.scaled_dot_product_attention` does not support `output_attentions=True`. Falling back to the manual attention implementation, "
+                'but specifying the manual implementation will be required from Transformers version v5.0.0 onwards. This warning can be removed using the argument `attn_implementation="eager"` when loading the model.'
+            )
+            return super().forward(
+                hidden_states=hidden_states,
+                attention_mask=attention_mask,
+                position_ids=position_ids,
+                past_key_value=past_key_value,
+                output_attentions=output_attentions,
+                use_cache=use_cache,
+                is_causal=is_causal
+            )
+
+        bsz, q_len, _ = hidden_states.size()
+
+        query_states = self.q_proj(hidden_states)
+        key_states = self.k_proj(hidden_states)
+        value_states = self.v_proj(hidden_states)
+
+        query_states = query_states.view(bsz, q_len, self.num_heads, self.head_dim).transpose(1, 2)
+        key_states = key_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
+        value_states = value_states.view(bsz, q_len, self.num_key_value_heads, self.head_dim).transpose(1, 2)
+
+        kv_seq_len = key_states.shape[-2]
+        if past_key_value is not None:
+            kv_seq_len += past_key_value.get_usable_length(kv_seq_len, self.layer_idx)
+        cos, sin = self.rotary_emb(value_states, seq_len=kv_seq_len)
+
+        query_states, key_states = apply_rotary_pos_emb(query_states, key_states, cos, sin, position_ids)
+
+        if past_key_value is not None:
+            cache_kwargs = {"sin": sin, "cos": cos}  # Specific to RoPE models
+            key_states, value_states = past_key_value.update(key_states, value_states, self.layer_idx, cache_kwargs)
+
+        key_states = repeat_kv(key_states, self.num_key_value_groups)
+        value_states = repeat_kv(value_states, self.num_key_value_groups)
+
+        if attention_mask is not None:
+            if attention_mask.size() != (bsz, 1, q_len, kv_seq_len):
+                raise ValueError(
+                    f"Attention mask should be of size {(bsz, 1, q_len, kv_seq_len)}, but is {attention_mask.size()}"
+                )
+
+        # SDPA with memory-efficient backend is currently (torch==2.1.2) bugged with non-contiguous inputs with custom attn_mask,
+        # Reference: https://github.com/pytorch/pytorch/issues/112577.
+        if query_states.device.type == "cuda" and attention_mask is not None:
+            query_states = query_states.contiguous()
+            key_states = key_states.contiguous()
+            value_states = value_states.contiguous()
+
+        attn_output = torch.nn.functional.scaled_dot_product_attention(
+            query_states,
+            key_states,
+            value_states,
+            attn_mask=attention_mask,
+            dropout_p=self.attention_dropout if self.training else 0.0,
+            # The q_len > 1 is necessary to match with AttentionMaskConverter.to_causal_4d that does not create a causal mask in case q_len == 1.
+            is_causal=is_causal and attention_mask is None and q_len > 1,
+        )
+
+        attn_output = attn_output.transpose(1, 2).contiguous()
+        attn_output = attn_output.view(bsz, q_len, self.hidden_size)
+
+        attn_output = self.o_proj(attn_output)
+
+        return attn_output, None, past_key_value
+
+
+QWEN2_ATTENTION_CLASSES = {
+    "eager": Qwen2Attention,
+    "flash_attention_2": Qwen2FlashAttention2,
+    "sdpa": Qwen2SdpaAttention,
+}
+
+
+class Qwen2DecoderLayer(nn.Module):
+    def __init__(self, config: Qwen2Config, layer_idx: int):
+        super().__init__()
+        self.hidden_size = config.hidden_size
+
+        if config.use_sliding_window and config._attn_implementation != "flash_attention_2":
+            logger.warning_once(
+                f"Sliding Window Attention is enabled but not implemented for `{config._attn_implementation}`; "
+                "unexpected results may be encountered."
+            )
+        self.self_attn = QWEN2_ATTENTION_CLASSES[config._attn_implementation](config, layer_idx)
+
+        self.mlp = Qwen2MLP(config)
+        self.input_layernorm = Qwen2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
+        self.post_attention_layernorm = Qwen2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
+
+    def forward(
+        self,
+        hidden_states: torch.Tensor,
+        attention_mask: Optional[torch.Tensor] = None,
+        position_ids: Optional[torch.LongTensor] = None,
+        past_key_value: Optional[Tuple[torch.Tensor]] = None,
+        output_attentions: Optional[bool] = False,
+        use_cache: Optional[bool] = False,
+        is_causal: Optional[bool] = True,
+        **kwargs,
+    ) -> Tuple[torch.FloatTensor, Optional[Tuple[torch.FloatTensor, torch.FloatTensor]]]:
+        if "padding_mask" in kwargs:
+            warnings.warn(
+                "Passing `padding_mask` is deprecated and will be removed in v4.37. "
+                "Please make sure use `attention_mask` instead.`"
+            )
+        """
+        Args:
+            hidden_states (`torch.FloatTensor`): input to the layer of shape `(batch, seq_len, embed_dim)`
+            attention_mask (`torch.FloatTensor`, *optional*): attention mask of size
+                `(batch, sequence_length)` where padding elements are indicated by 0.
+            output_attentions (`bool`, *optional*):
+                Whether or not to return the attentions tensors of all attention layers. See `attentions` under
+                returned tensors for more detail.
+            use_cache (`bool`, *optional*):
+                If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding
+                (see `past_key_values`).
+            past_key_value (`Tuple(torch.FloatTensor)`, *optional*): cached past key and value projection states
+        """
+
+        residual = hidden_states
+
+        hidden_states = self.input_layernorm(hidden_states)
+
+        # Self Attention
+        hidden_states, self_attn_weights, present_key_value = self.self_attn(
+            hidden_states=hidden_states,
+            attention_mask=attention_mask,
+            position_ids=position_ids,
+            past_key_value=past_key_value,
+            output_attentions=output_attentions,
+            use_cache=use_cache,
+            is_causal=is_causal,
+        )
+        hidden_states = residual + hidden_states
+
+        # Fully Connected
+        residual = hidden_states
+        hidden_states = self.post_attention_layernorm(hidden_states)
+        hidden_states = self.mlp(hidden_states)
+        hidden_states = residual + hidden_states
+
+        outputs = (hidden_states,)
+
+        if output_attentions:
+            outputs += (self_attn_weights,)
+
+        if use_cache:
+            outputs += (present_key_value,)
+
+        return outputs
+
+
+QWEN2_START_DOCSTRING = r"""
+    This model inherits from [`PreTrainedModel`]. Check the superclass documentation for the generic methods the
+    library implements for all its model (such as downloading or saving, resizing the input embeddings, pruning heads
+    etc.)
+
+    This model is also a PyTorch [torch.nn.Module](https://pytorch.org/docs/stable/nn.html#torch.nn.Module) subclass.
+    Use it as a regular PyTorch Module and refer to the PyTorch documentation for all matter related to general usage
+    and behavior.
+
+    Parameters:
+        config ([`Qwen2Config`]):
+            Model configuration class with all the parameters of the model. Initializing with a config file does not
+            load the weights associated with the model, only the configuration. Check out the
+            [`~PreTrainedModel.from_pretrained`] method to load the model weights.
+"""
+
+
+@add_start_docstrings(
+    "The bare Qwen2 Model outputting raw hidden-states without any specific head on top.",
+    QWEN2_START_DOCSTRING,
+)
+class Qwen2PreTrainedModel(PreTrainedModel):
+    config_class = Qwen2Config
+    base_model_prefix = "model"
+    supports_gradient_checkpointing = True
+    _no_split_modules = ["Qwen2DecoderLayer"]
+    _skip_keys_device_placement = "past_key_values"
+    _supports_flash_attn_2 = True
+    _supports_sdpa = True
+    _supports_cache_class = True
+
+    def _init_weights(self, module):
+        std = self.config.initializer_range
+        if isinstance(module, nn.Linear):
+            module.weight.data.normal_(mean=0.0, std=std)
+            if module.bias is not None:
+                module.bias.data.zero_()
+        elif isinstance(module, nn.Embedding):
+            module.weight.data.normal_(mean=0.0, std=std)
+            if module.padding_idx is not None:
+                module.weight.data[module.padding_idx].zero_()
+
+
+QWEN2_INPUTS_DOCSTRING = r"""
+    Args:
+        input_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`):
+            Indices of input sequence tokens in the vocabulary. Padding will be ignored by default should you provide
+            it.
+
+            Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and
+            [`PreTrainedTokenizer.__call__`] for details.
+
+            [What are input IDs?](../glossary#input-ids)
+        attention_mask (`torch.Tensor` of shape `(batch_size, sequence_length)`, *optional*):
+            Mask to avoid performing attention on padding token indices. Mask values selected in `[0, 1]`:
+
+            - 1 for tokens that are **not masked**,
+            - 0 for tokens that are **masked**.
+
+            [What are attention masks?](../glossary#attention-mask)
+
+            Indices can be obtained using [`AutoTokenizer`]. See [`PreTrainedTokenizer.encode`] and
+            [`PreTrainedTokenizer.__call__`] for details.
+
+            If `past_key_values` is used, optionally only the last `decoder_input_ids` have to be input (see
+            `past_key_values`).
+
+            If you want to change padding behavior, you should read [`modeling_opt._prepare_decoder_attention_mask`]
+            and modify to your needs. See diagram 1 in [the paper](https://arxiv.org/abs/1910.13461) for more
+            information on the default strategy.
+
+            - 1 indicates the head is **not masked**,
+            - 0 indicates the head is **masked**.
+        position_ids (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*):
+            Indices of positions of each input sequence tokens in the position embeddings. Selected in the range `[0,
+            config.n_positions - 1]`.
+
+            [What are position IDs?](../glossary#position-ids)
+        past_key_values (`Cache` or `tuple(tuple(torch.FloatTensor))`, *optional*):
+            Pre-computed hidden-states (key and values in the self-attention blocks and in the cross-attention
+            blocks) that can be used to speed up sequential decoding. This typically consists in the `past_key_values`
+            returned by the model at a previous stage of decoding, when `use_cache=True` or `config.use_cache=True`.
+
+            Two formats are allowed:
+            - a [`~cache_utils.Cache`] instance;
+            - Tuple of `tuple(torch.FloatTensor)` of length `config.n_layers`, with each tuple having 2 tensors of
+            shape `(batch_size, num_heads, sequence_length, embed_size_per_head)`). This is also known as the legacy
+            cache format.
+
+            The model will output the same cache format that is fed as input. If no `past_key_values` are passed, the
+            legacy cache format will be returned.
+
+            If `past_key_values` are used, the user can optionally input only the last `input_ids` (those that don't
+            have their past key value states given to this model) of shape `(batch_size, 1)` instead of all `input_ids`
+            of shape `(batch_size, sequence_length)`.
+        inputs_embeds (`torch.FloatTensor` of shape `(batch_size, sequence_length, hidden_size)`, *optional*):
+            Optionally, instead of passing `input_ids` you can choose to directly pass an embedded representation. This
+            is useful if you want more control over how to convert `input_ids` indices into associated vectors than the
+            model's internal embedding lookup matrix.
+        use_cache (`bool`, *optional*):
+            If set to `True`, `past_key_values` key value states are returned and can be used to speed up decoding (see
+            `past_key_values`).
+        output_attentions (`bool`, *optional*):
+            Whether or not to return the attentions tensors of all attention layers. See `attentions` under returned
+            tensors for more detail.
+        output_hidden_states (`bool`, *optional*):
+            Whether or not to return the hidden states of all layers. See `hidden_states` under returned tensors for
+            more detail.
+        return_dict (`bool`, *optional*):
+            Whether or not to return a [`~utils.ModelOutput`] instead of a plain tuple.
+"""
+
+
+@add_start_docstrings(
+    "The bare Qwen2 Model outputting raw hidden-states without any specific head on top.",
+    QWEN2_START_DOCSTRING,
+)
+class Qwen2Model(Qwen2PreTrainedModel):
+    """
+    Transformer decoder consisting of *config.num_hidden_layers* layers. Each layer is a [`Qwen2DecoderLayer`]
+
+    Args:
+        config: Qwen2Config
+    """
+
+    def __init__(self, config: Qwen2Config):
+        super().__init__(config)
+        self.padding_idx = config.pad_token_id
+        self.vocab_size = config.vocab_size
+
+        self.embed_tokens = nn.Embedding(config.vocab_size, config.hidden_size, self.padding_idx)
+        self.layers = nn.ModuleList(
+            [Qwen2DecoderLayer(config, layer_idx) for layer_idx in range(config.num_hidden_layers)]
+        )
+        self._attn_implementation = config._attn_implementation
+        self.norm = Qwen2RMSNorm(config.hidden_size, eps=config.rms_norm_eps)
+
+        self.gradient_checkpointing = False
+        # Initialize weights and apply final processing
+        self.post_init()
+
+    def get_input_embeddings(self):
+        return self.embed_tokens
+
+    def set_input_embeddings(self, value):
+        self.embed_tokens = value
+
+    @add_start_docstrings_to_model_forward(QWEN2_INPUTS_DOCSTRING)
+    def forward(
+        self,
+        input_ids: torch.LongTensor = None,
+        attention_mask: Optional[torch.Tensor] = None,
+        position_ids: Optional[torch.LongTensor] = None,
+        past_key_values: Optional[List[torch.FloatTensor]] = None,
+        inputs_embeds: Optional[torch.FloatTensor] = None,
+        use_cache: Optional[bool] = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        return_dict: Optional[bool] = None,
+        labels: Optional[torch.LongTensor] = None,
+        is_causal: Optional[bool] = True,
+    ) -> Union[Tuple, BaseModelOutputWithPast]:
+        output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
+        output_hidden_states = (
+            output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
+        )
+        use_cache = use_cache if use_cache is not None else self.config.use_cache
+
+        return_dict = return_dict if return_dict is not None else self.config.use_return_dict
+
+        # retrieve input_ids and inputs_embeds
+        if input_ids is not None and inputs_embeds is not None:
+            raise ValueError("You cannot specify both decoder_input_ids and decoder_inputs_embeds at the same time")
+        elif input_ids is not None:
+            batch_size, seq_length = input_ids.shape
+        elif inputs_embeds is not None:
+            batch_size, seq_length, _ = inputs_embeds.shape
+        else:
+            raise ValueError("You have to specify either decoder_input_ids or decoder_inputs_embeds")
+
+        if self.gradient_checkpointing and self.training:
+            if use_cache:
+                logger.warning_once(
+                    "`use_cache=True` is incompatible with gradient checkpointing. Setting `use_cache=False`..."
+                )
+                use_cache = False
+
+        past_key_values_length = 0
+
+        if use_cache:
+            use_legacy_cache = not isinstance(past_key_values, Cache)
+            if use_legacy_cache:
+                past_key_values = DynamicCache.from_legacy_cache(past_key_values)
+            past_key_values_length = past_key_values.get_usable_length(seq_length)
+
+        if position_ids is None:
+            device = input_ids.device if input_ids is not None else inputs_embeds.device
+            position_ids = torch.arange(
+                past_key_values_length, seq_length + past_key_values_length, dtype=torch.long, device=device
+            )
+            position_ids = position_ids.unsqueeze(0).view(-1, seq_length)
+        else:
+            position_ids = position_ids.view(-1, seq_length).long()
+
+        if inputs_embeds is None:
+            inputs_embeds = self.embed_tokens(input_ids)
+
+        if attention_mask is not None and self._attn_implementation == "flash_attention_2" and use_cache:
+            is_padding_right = attention_mask[:, -1].sum().item() != batch_size
+            if is_padding_right:
+                raise ValueError(
+                    "You are attempting to perform batched generation with padding_side='right'"
+                    " this may lead to unexpected behaviour for Flash Attention version of Qwen2. Make sure to "
+                    " call `tokenizer.padding_side  = 'left'` before tokenizing the input. "
+                )
+
+        if self._attn_implementation == "flash_attention_2":
+            # 2d mask is passed through the layers
+            attention_mask = attention_mask if (attention_mask is not None and 0 in attention_mask) else None
+        elif self._attn_implementation == "sdpa" and not output_attentions:
+            # output_attentions=True can not be supported when using SDPA, and we fall back on
+            # the manual implementation that requires a 4D causal mask in all cases.
+            if is_causal:
+                attention_mask = _prepare_4d_causal_attention_mask_for_sdpa(
+                    attention_mask,
+                    (batch_size, seq_length),
+                    inputs_embeds,
+                    past_key_values_length,
+                )
+            else:
+                attention_mask = _prepare_4d_attention_mask_for_sdpa(
+                    attention_mask, inputs_embeds.dtype
+                )
+        else:
+            # 4d mask is passed through the layers
+            if is_causal:
+                # Causal mask with -3.3895e+38 where no attention should be
+                attention_mask = _prepare_4d_causal_attention_mask(
+                    attention_mask,
+                    (batch_size, seq_length),
+                    inputs_embeds,
+                    past_key_values_length,
+                    sliding_window=self.config.sliding_window,
+                )
+            else:
+                # Shape: batch_size, 1, query_length, key_value_length
+                attention_mask = _prepare_4d_attention_mask(
+                    attention_mask, inputs_embeds.dtype
+                )
+
+        hidden_states = inputs_embeds
+
+        # decoder layers
+        all_hidden_states = () if output_hidden_states else None
+        all_self_attns = () if output_attentions else None
+        next_decoder_cache = None
+
+        for decoder_layer in self.layers:
+            if output_hidden_states:
+                all_hidden_states += (hidden_states,)
+
+            if self.gradient_checkpointing and self.training:
+                layer_outputs = self._gradient_checkpointing_func(
+                    decoder_layer.__call__,
+                    hidden_states,
+                    attention_mask,
+                    position_ids,
+                    past_key_values,
+                    output_attentions,
+                    use_cache,
+                    is_causal,
+                )
+            else:
+                layer_outputs = decoder_layer(
+                    hidden_states,
+                    attention_mask=attention_mask,
+                    position_ids=position_ids,
+                    past_key_value=past_key_values,
+                    output_attentions=output_attentions,
+                    use_cache=use_cache,
+                    is_causal=is_causal,
+                )
+
+            hidden_states = layer_outputs[0]
+
+            if use_cache:
+                next_decoder_cache = layer_outputs[2 if output_attentions else 1]
+
+            if output_attentions:
+                all_self_attns += (layer_outputs[1],)
+
+        hidden_states = self.norm(hidden_states)
+
+        # add hidden states from the last decoder layer
+        if output_hidden_states:
+            all_hidden_states += (hidden_states,)
+
+        next_cache = None
+        if use_cache:
+            next_cache = next_decoder_cache.to_legacy_cache() if use_legacy_cache else next_decoder_cache
+
+        if not return_dict:
+            return tuple(v for v in [hidden_states, next_cache, all_hidden_states, all_self_attns] if v is not None)
+        return BaseModelOutputWithPast(
+            last_hidden_state=hidden_states,
+            past_key_values=next_cache,
+            hidden_states=all_hidden_states,
+            attentions=all_self_attns,
+        )
+
+
+class Qwen2ForCausalLM(Qwen2PreTrainedModel):
+    _tied_weights_keys = ["lm_head.weight"]
+
+    def __init__(self, config):
+        super().__init__(config)
+        self.model = Qwen2Model(config)
+        self.vocab_size = config.vocab_size
+        self.lm_head = nn.Linear(config.hidden_size, config.vocab_size, bias=False)
+
+        # Initialize weights and apply final processing
+        self.post_init()
+
+    def get_input_embeddings(self):
+        return self.model.embed_tokens
+
+    def set_input_embeddings(self, value):
+        self.model.embed_tokens = value
+
+    def get_output_embeddings(self):
+        return self.lm_head
+
+    def set_output_embeddings(self, new_embeddings):
+        self.lm_head = new_embeddings
+
+    def set_decoder(self, decoder):
+        self.model = decoder
+
+    def get_decoder(self):
+        return self.model
+
+    @add_start_docstrings_to_model_forward(QWEN2_INPUTS_DOCSTRING)
+    @replace_return_docstrings(output_type=CausalLMOutputWithPast, config_class=_CONFIG_FOR_DOC)
+    def forward(
+        self,
+        input_ids: torch.LongTensor = None,
+        attention_mask: Optional[torch.Tensor] = None,
+        position_ids: Optional[torch.LongTensor] = None,
+        past_key_values: Optional[List[torch.FloatTensor]] = None,
+        inputs_embeds: Optional[torch.FloatTensor] = None,
+        labels: Optional[torch.LongTensor] = None,
+        use_cache: Optional[bool] = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        return_dict: Optional[bool] = None,
+        is_causal: Optional[bool] = True,
+    ) -> Union[Tuple, CausalLMOutputWithPast]:
+        r"""
+        Args:
+            labels (`torch.LongTensor` of shape `(batch_size, sequence_length)`, *optional*):
+                Labels for computing the masked language modeling loss. Indices should either be in `[0, ...,
+                config.vocab_size]` or -100 (see `input_ids` docstring). Tokens with indices set to `-100` are ignored
+                (masked), the loss is only computed for the tokens with labels in `[0, ..., config.vocab_size]`.
+
+        Returns:
+
+        Example:
+
+        ```python
+        >>> from transformers import AutoTokenizer, Qwen2ForCausalLM
+
+        >>> model = Qwen2ForCausalLM.from_pretrained(PATH_TO_CONVERTED_WEIGHTS)
+        >>> tokenizer = AutoTokenizer.from_pretrained(PATH_TO_CONVERTED_TOKENIZER)
+
+        >>> prompt = "Hey, are you conscious? Can you talk to me?"
+        >>> inputs = tokenizer(prompt, return_tensors="pt")
+
+        >>> # Generate
+        >>> generate_ids = model.generate(inputs.input_ids, max_length=30)
+        >>> tokenizer.batch_decode(generate_ids, skip_special_tokens=True, clean_up_tokenization_spaces=False)[0]
+        "Hey, are you conscious? Can you talk to me?\nI'm not conscious, but I can talk to you."
+        ```"""
+
+        output_attentions = output_attentions if output_attentions is not None else self.config.output_attentions
+        output_hidden_states = (
+            output_hidden_states if output_hidden_states is not None else self.config.output_hidden_states
+        )
+        return_dict = return_dict if return_dict is not None else self.config.use_return_dict
+
+        # decoder outputs consists of (dec_features, layer_state, dec_hidden, dec_attn)
+        outputs = self.model(
+            input_ids=input_ids,
+            attention_mask=attention_mask,
+            position_ids=position_ids,
+            past_key_values=past_key_values,
+            inputs_embeds=inputs_embeds,
+            use_cache=use_cache,
+            output_attentions=output_attentions,
+            output_hidden_states=output_hidden_states,
+            return_dict=return_dict,
+            is_causal=is_causal,
+        )
+
+        hidden_states = outputs[0]
+        logits = self.lm_head(hidden_states)
+        logits = logits.float()
+
+        loss = None
+        if labels is not None:
+            # Shift so that tokens < n predict n
+            shift_logits = logits[..., :-1, :].contiguous()
+            shift_labels = labels[..., 1:].contiguous()
+            # Flatten the tokens
+            loss_fct = CrossEntropyLoss()
+            shift_logits = shift_logits.view(-1, self.config.vocab_size)
+            shift_labels = shift_labels.view(-1)
+            # Enable model parallelism
+            shift_labels = shift_labels.to(shift_logits.device)
+            loss = loss_fct(shift_logits, shift_labels)
+
+        if not return_dict:
+            output = (logits,) + outputs[1:]
+            return (loss,) + output if loss is not None else output
+
+        return CausalLMOutputWithPast(
+            loss=loss,
+            logits=logits,
+            past_key_values=outputs.past_key_values,
+            hidden_states=outputs.hidden_states,
+            attentions=outputs.attentions,
+        )
+
+    def prepare_inputs_for_generation(
+        self, input_ids, past_key_values=None, attention_mask=None, inputs_embeds=None, **kwargs
+    ):
+        # Omit tokens covered by past_key_values
+        if past_key_values is not None:
+            if isinstance(past_key_values, Cache):
+                cache_length = past_key_values.get_seq_length()
+                past_length = past_key_values.seen_tokens
+                max_cache_length = past_key_values.get_max_length()
+            else:
+                cache_length = past_length = past_key_values[0][0].shape[2]
+                max_cache_length = None
+
+            # Keep only the unprocessed tokens:
+            # 1 - If the length of the attention_mask exceeds the length of input_ids, then we are in a setting where
+            # some of the inputs are exclusively passed as part of the cache (e.g. when passing input_embeds as
+            # input)
+            if attention_mask is not None and attention_mask.shape[1] > input_ids.shape[1]:
+                input_ids = input_ids[:, -(attention_mask.shape[1] - past_length) :]
+            # 2 - If the past_length is smaller than input_ids', then input_ids holds all input tokens. We can discard
+            # input_ids based on the past_length.
+            elif past_length < input_ids.shape[1]:
+                input_ids = input_ids[:, past_length:]
+            # 3 - Otherwise (past_length >= input_ids.shape[1]), let's assume input_ids only has unprocessed tokens.
+
+            # If we are about to go beyond the maximum cache length, we need to crop the input attention mask.
+            if (
+                max_cache_length is not None
+                and attention_mask is not None
+                and cache_length + input_ids.shape[1] > max_cache_length
+            ):
+                attention_mask = attention_mask[:, -max_cache_length:]
+
+        position_ids = kwargs.get("position_ids", None)
+        if attention_mask is not None and position_ids is None:
+            # create position_ids on the fly for batch generation
+            position_ids = attention_mask.long().cumsum(-1) - 1
+            position_ids.masked_fill_(attention_mask == 0, 1)
+            if past_key_values:
+                position_ids = position_ids[:, -input_ids.shape[1] :]
+
+        # if `inputs_embeds` are passed, we only want to use them in the 1st generation step
+        if inputs_embeds is not None and past_key_values is None:
+            model_inputs = {"inputs_embeds": inputs_embeds}
+        else:
+            model_inputs = {"input_ids": input_ids}
+
+        model_inputs.update(
+            {
+                "position_ids": position_ids,
+                "past_key_values": past_key_values,
+                "use_cache": kwargs.get("use_cache"),
+                "attention_mask": attention_mask,
+            }
+        )
+        return model_inputs
+
+    @staticmethod
+    def _reorder_cache(past_key_values, beam_idx):
+        reordered_past = ()
+        for layer_past in past_key_values:
+            reordered_past += (
+                tuple(past_state.index_select(0, beam_idx.to(past_state.device)) for past_state in layer_past),
+            )
+        return reordered_past
+
+
+@add_start_docstrings(
+    """
+    The Qwen2 Model transformer with a sequence classification head on top (linear layer).
+
+    [`Qwen2ForSequenceClassification`] uses the last token in order to do the classification, as other causal models
+    (e.g. GPT-2) do.
+
+    Since it does classification on the last token, it requires to know the position of the last token. If a
+    `pad_token_id` is defined in the configuration, it finds the last token that is not a padding token in each row. If
+    no `pad_token_id` is defined, it simply takes the last value in each row of the batch. Since it cannot guess the
+    padding tokens when `inputs_embeds` are passed instead of `input_ids`, it does the same (take the last value in
+    each row of the batch).
+    """,
+    QWEN2_START_DOCSTRING,
+)
+class Qwen2ForSequenceClassification(Qwen2PreTrainedModel):
+    def __init__(self, config):
+        super().__init__(config)
+        self.num_labels = config.num_labels
+        self.model = Qwen2Model(config)
+        self.score = nn.Linear(config.hidden_size, self.num_labels, bias=False)
+
+        # Initialize weights and apply final processing
+        self.post_init()
+
+    def get_input_embeddings(self):
+        return self.model.embed_tokens
+
+    def set_input_embeddings(self, value):
+        self.model.embed_tokens = value
+
+    @add_start_docstrings_to_model_forward(QWEN2_INPUTS_DOCSTRING)
+    def forward(
+        self,
+        input_ids: torch.LongTensor = None,
+        attention_mask: Optional[torch.Tensor] = None,
+        position_ids: Optional[torch.LongTensor] = None,
+        past_key_values: Optional[List[torch.FloatTensor]] = None,
+        inputs_embeds: Optional[torch.FloatTensor] = None,
+        labels: Optional[torch.LongTensor] = None,
+        use_cache: Optional[bool] = None,
+        output_attentions: Optional[bool] = None,
+        output_hidden_states: Optional[bool] = None,
+        return_dict: Optional[bool] = None,
+        is_causal: Optional[bool] = True,
+    ) -> Union[Tuple, SequenceClassifierOutputWithPast]:
+        r"""
+        labels (`torch.LongTensor` of shape `(batch_size,)`, *optional*):
+            Labels for computing the sequence classification/regression loss. Indices should be in `[0, ...,
+            config.num_labels - 1]`. If `config.num_labels == 1` a regression loss is computed (Mean-Square loss), If
+            `config.num_labels > 1` a classification loss is computed (Cross-Entropy).
+        """
+        return_dict = return_dict if return_dict is not None else self.config.use_return_dict
+
+        transformer_outputs = self.model(
+            input_ids,
+            attention_mask=attention_mask,
+            position_ids=position_ids,
+            past_key_values=past_key_values,
+            inputs_embeds=inputs_embeds,
+            use_cache=use_cache,
+            output_attentions=output_attentions,
+            output_hidden_states=output_hidden_states,
+            return_dict=return_dict,
+            is_causal=is_causal,
+        )
+        hidden_states = transformer_outputs[0]
+        logits = self.score(hidden_states)
+
+        if input_ids is not None:
+            batch_size = input_ids.shape[0]
+        else:
+            batch_size = inputs_embeds.shape[0]
+
+        if self.config.pad_token_id is None and batch_size != 1:
+            raise ValueError("Cannot handle batch sizes > 1 if no padding token is defined.")
+        if self.config.pad_token_id is None:
+            sequence_lengths = -1
+        else:
+            if input_ids is not None:
+                # if no pad token found, use modulo instead of reverse indexing for ONNX compatibility
+                sequence_lengths = torch.eq(input_ids, self.config.pad_token_id).int().argmax(-1) - 1
+                sequence_lengths = sequence_lengths % input_ids.shape[-1]
+                sequence_lengths = sequence_lengths.to(logits.device)
+            else:
+                sequence_lengths = -1
+
+        pooled_logits = logits[torch.arange(batch_size, device=logits.device), sequence_lengths]
+
+        loss = None
+        if labels is not None:
+            labels = labels.to(logits.device)
+            if self.config.problem_type is None:
+                if self.num_labels == 1:
+                    self.config.problem_type = "regression"
+                elif self.num_labels > 1 and (labels.dtype == torch.long or labels.dtype == torch.int):
+                    self.config.problem_type = "single_label_classification"
+                else:
+                    self.config.problem_type = "multi_label_classification"
+
+            if self.config.problem_type == "regression":
+                loss_fct = MSELoss()
+                if self.num_labels == 1:
+                    loss = loss_fct(pooled_logits.squeeze(), labels.squeeze())
+                else:
+                    loss = loss_fct(pooled_logits, labels)
+            elif self.config.problem_type == "single_label_classification":
+                loss_fct = CrossEntropyLoss()
+                loss = loss_fct(pooled_logits.view(-1, self.num_labels), labels.view(-1))
+            elif self.config.problem_type == "multi_label_classification":
+                loss_fct = BCEWithLogitsLoss()
+                loss = loss_fct(pooled_logits, labels)
+        if not return_dict:
+            output = (pooled_logits,) + transformer_outputs[1:]
+            return ((loss,) + output) if loss is not None else output
+
+        return SequenceClassifierOutputWithPast(
+            loss=loss,
+            logits=pooled_logits,
+            past_key_values=transformer_outputs.past_key_values,
+            hidden_states=transformer_outputs.hidden_states,
+            attentions=transformer_outputs.attentions,
+        )

modules.json

@@ -0,0 +1,20 @@
+[
+  {
+    "idx": 0,
+    "name": "0",
+    "path": "",
+    "type": "sentence_transformers.models.Transformer"
+  },
+  {
+    "idx": 1,
+    "name": "1",
+    "path": "1_Pooling",
+    "type": "sentence_transformers.models.Pooling"
+  },
+  {
+    "idx": 2,
+    "name": "2",
+    "path": "2_Normalize",
+    "type": "sentence_transformers.models.Normalize"
+  }
+]

scripts/eval_mteb.py

@@ -0,0 +1,732 @@
+import argparse
+from collections import defaultdict
+import json
+import logging
+import math
+import os
+import sys
+import queue
+from typing import Dict, List, Optional, Union
+
+from tqdm.autonotebook import trange
+import datasets
+import numpy as np
+import torch
+import torch.multiprocessing as mp
+from transformers import AutoModel, AutoTokenizer
+from transformers import AutoModelForCausalLM
+from mteb import MTEB, CrosslingualTask, MultilingualTask
+
+TASK_LIST_CLASSIFICATION = [
+    "AmazonCounterfactualClassification",
+    "AmazonPolarityClassification",
+    "AmazonReviewsClassification",
+    "Banking77Classification",
+    "EmotionClassification",
+    "ImdbClassification",
+    "MassiveIntentClassification",
+    "MassiveScenarioClassification",
+    "MTOPDomainClassification",
+    "MTOPIntentClassification",
+    "ToxicConversationsClassification",
+    "TweetSentimentExtractionClassification",
+]
+
+TASK_LIST_CLUSTERING = [
+    "ArxivClusteringP2P",
+    "ArxivClusteringS2S",
+    "BiorxivClusteringP2P",
+    "BiorxivClusteringS2S",
+    "MedrxivClusteringP2P",
+    "MedrxivClusteringS2S",
+    "RedditClustering",
+    "RedditClusteringP2P",
+    "StackExchangeClustering",
+    "StackExchangeClusteringP2P",
+    "TwentyNewsgroupsClustering",
+]
+
+TASK_LIST_PAIR_CLASSIFICATION = [
+    "SprintDuplicateQuestions",
+    "TwitterSemEval2015",
+    "TwitterURLCorpus",
+]
+
+TASK_LIST_RERANKING = [
+    "AskUbuntuDupQuestions",
+    "MindSmallReranking",
+    "SciDocsRR",
+    "StackOverflowDupQuestions",
+]
+
+TASK_LIST_RETRIEVAL = [
+    "ArguAna",
+    "ClimateFEVER",
+    "CQADupstackAndroidRetrieval",
+    "CQADupstackEnglishRetrieval",
+    "CQADupstackGamingRetrieval",
+    "CQADupstackGisRetrieval",
+    "CQADupstackMathematicaRetrieval",
+    "CQADupstackPhysicsRetrieval",
+    "CQADupstackProgrammersRetrieval",
+    "CQADupstackStatsRetrieval",
+    "CQADupstackTexRetrieval",
+    "CQADupstackUnixRetrieval",
+    "CQADupstackWebmastersRetrieval",
+    "CQADupstackWordpressRetrieval",
+    "DBPedia",
+    "FEVER",
+    "FiQA2018",
+    "HotpotQA",
+    "MSMARCO",
+    "NFCorpus",
+    "NQ",
+    "QuoraRetrieval",
+    "SCIDOCS",
+    "SciFact",
+    "Touche2020",
+    "TRECCOVID",
+]
+
+TASK_LIST_STS = [
+    "BIOSSES",
+    "SICK-R",
+    "STS12",
+    "STS13",
+    "STS14",
+    "STS15",
+    "STS16",
+    "STS17",
+    "STS22",
+    "STSBenchmark",
+    "SummEval",
+]
+
+MTEB_TASK_LIST = (
+    TASK_LIST_CLASSIFICATION
+    + TASK_LIST_CLUSTERING
+    + TASK_LIST_PAIR_CLASSIFICATION
+    + TASK_LIST_RERANKING
+    + TASK_LIST_RETRIEVAL
+    + TASK_LIST_STS
+)
+
+
+CMTEB_TASK_LIST = ['TNews', 'IFlyTek', 'MultilingualSentiment', 'JDReview', 'OnlineShopping', 'Waimai','AmazonReviewsClassification', 'MassiveIntentClassification', 'MassiveScenarioClassification', 'MultilingualSentiment',
+                   'CLSClusteringS2S', 'CLSClusteringP2P', 'ThuNewsClusteringS2S', 'ThuNewsClusteringP2P',
+                   'Ocnli', 'Cmnli',
+                   'T2Reranking', 'MmarcoReranking', 'CMedQAv1', 'CMedQAv2',
+                   'T2Retrieval', 'MMarcoRetrieval', 'DuRetrieval', 'CovidRetrieval', 'CmedqaRetrieval', 'EcomRetrieval', 'MedicalRetrieval', 'VideoRetrieval',
+                   'ATEC', 'BQ', 'LCQMC', 'PAWSX', 'STSB', 'AFQMC', 'QBQTC', 'STS22']
+
+
+MTEB_PL = [
+    "CBD","PolEmo2.0-IN","PolEmo2.0-OUT","AllegroReviews","PAC","MassiveIntentClassification","MassiveScenarioClassification",
+    "SICK-E-PL","PPC","CDSC-E","PSC","8TagsClustering","SICK-R-PL","CDSC-R","STS22",
+    "ArguAna-PL","DBPedia-PL","FiQA-PL","HotpotQA-PL","MSMARCO-PL","NFCorpus-PL","NQ-PL","Quora-PL","SCIDOCS-PL","SciFact-PL","TRECCOVID-PL"
+]
+
+MTEB_FR = [
+    "AmazonReviewsClassification","MasakhaNEWSClassification","MassiveIntentClassification",
+    "MassiveScenarioClassification","MTOPDomainClassification","MTOPIntentClassification","OpusparcusPC","PawsX",
+    "AlloProfClusteringP2P","AlloProfClusteringS2S","HALClusteringS2S","MasakhaNEWSClusteringP2P","MasakhaNEWSClusteringS2S","MLSUMClusteringP2P","MLSUMClusteringS2S",
+    "SyntecReranking","AlloprofReranking","AlloprofRetrieval","BSARDRetrieval","SyntecRetrieval","XPQARetrieval","MintakaRetrieval",
+    "SummEvalFr","STSBenchmarkMultilingualSTS","STS22","SICKFr"
+]
+
+logging.basicConfig(
+    level=logging.INFO,
+    format='%(asctime)s - %(levelname)s - %(name)s : %(message)s'
+)
+
+logger = logging.getLogger('eval_mteb_qwen.py')
+
+def get_detailed_instruct(task_description: str) -> str:
+    if not task_description:
+        return ''
+
+    return 'Instruct: {}\nQuery: '.format(task_description)
+
+def get_task_def_by_task_name_and_type(task_name: str, task_type: str, default_instruct='Given a web search query, retrieve relevant passages that answer the query') -> str:
+    if task_type in ['STS']:
+        return "Retrieve semantically similar text"
+
+    if task_type in ['Summarization']:
+        return "Given a news summary, retrieve other semantically similar summaries"
+
+    if task_type in ['BitextMining']:
+        return "Retrieve parallel sentences"
+
+    if task_type in ['Classification']:
+        task_name_to_instruct: Dict[str, str] = {
+            'AmazonCounterfactualClassification': 'Classify a given Amazon customer review text as either counterfactual or not-counterfactual',
+            'AmazonPolarityClassification': 'Classify Amazon reviews into positive or negative sentiment',
+            'AmazonReviewsClassification': 'Classify the given Amazon review into its appropriate rating category',
+            'Banking77Classification': 'Given a online banking query, find the corresponding intents',
+            'EmotionClassification': 'Classify the emotion expressed in the given Twitter message into one of the six emotions: anger, fear, joy, love, sadness, and surprise',
+            'ImdbClassification': 'Classify the sentiment expressed in the given movie review text from the IMDB dataset',
+            'MassiveIntentClassification': 'Given a user utterance as query, find the user intents',
+            'MassiveScenarioClassification': 'Given a user utterance as query, find the user scenarios',
+            'MTOPDomainClassification': 'Classify the intent domain of the given utterance in task-oriented conversation',
+            'MTOPIntentClassification': 'Classify the intent of the given utterance in task-oriented conversation',
+            'ToxicConversationsClassification': 'Classify the given comments as either toxic or not toxic',
+            'TweetSentimentExtractionClassification': 'Classify the sentiment of a given tweet as either positive, negative, or neutral',
+            # C-MTEB eval instructions
+            'TNews': 'Classify the fine-grained category of the given news title',
+            'IFlyTek': 'Given an App description text, find the appropriate fine-grained category',
+            'MultilingualSentiment': 'Classify sentiment of the customer review into positive, neutral, or negative',
+            'JDReview': 'Classify the customer review for iPhone on e-commerce platform into positive or negative',
+            'OnlineShopping': 'Classify the customer review for online shopping into positive or negative',
+            'Waimai': 'Classify the customer review from a food takeaway platform into positive or negative',
+            # MTEB-pl eval instructions
+            "CBD":"Classify the sentiment of polish tweet reviews",
+            "PolEmo2.0-IN": "Classify the sentiment of in-domain (medicine and hotels) online reviews",
+            "PolEmo2.0-OUT":"Classify the sentiment of out-of-domain (products and school) online reviews",
+            "AllegroReviews": "Classify the sentiment of reviews from e-commerce marketplace Allegro",
+            "PAC": "Classify the sentence into one of the two types: \"BEZPIECZNE_POSTANOWIENIE_UMOWNE\" and \"KLAUZULA_ABUZYWNA\"",
+
+        }
+        return task_name_to_instruct[task_name]
+
+    if task_type in ['Clustering']:
+        task_name_to_instruct: Dict[str, str] = {
+            'ArxivClusteringP2P': 'Identify the main and secondary category of Arxiv papers based on the titles and abstracts',
+            'ArxivClusteringS2S': 'Identify the main and secondary category of Arxiv papers based on the titles',
+            'BiorxivClusteringP2P': 'Identify the main category of Biorxiv papers based on the titles and abstracts',
+            'BiorxivClusteringS2S': 'Identify the main category of Biorxiv papers based on the titles',
+            'MedrxivClusteringP2P': 'Identify the main category of Medrxiv papers based on the titles and abstracts',
+            'MedrxivClusteringS2S': 'Identify the main category of Medrxiv papers based on the titles',
+            'RedditClustering': 'Identify the topic or theme of Reddit posts based on the titles',
+            'RedditClusteringP2P': 'Identify the topic or theme of Reddit posts based on the titles and posts',
+            'StackExchangeClustering': 'Identify the topic or theme of StackExchange posts based on the titles',
+            'StackExchangeClusteringP2P': 'Identify the topic or theme of StackExchange posts based on the given paragraphs',
+            'TwentyNewsgroupsClustering': 'Identify the topic or theme of the given news articles',
+            # C-MTEB eval instructions
+            'CLSClusteringS2S': 'Identify the main category of scholar papers based on the titles',
+            'CLSClusteringP2P': 'Identify the main category of scholar papers based on the titles and abstracts',
+            'ThuNewsClusteringS2S': 'Identify the topic or theme of the given news articles based on the titles',
+            'ThuNewsClusteringP2P': 'Identify the topic or theme of the given news articles based on the titles and contents',
+            # MTEB-fr eval instructions
+            "AlloProfClusteringP2P": "Identify the main category of Allo Prof document based on the titles and descriptions",
+            "AlloProfClusteringS2S": "Identify the main category of Allo Prof document based on the titles",
+            "HALClusteringS2S": "Identify the main category of academic passage based on the titles and contents",
+            "MasakhaNEWSClusteringP2P": "Identify the topic or theme of the given news articles based on the titles and contents",
+            "MasakhaNEWSClusteringS2S": "Identify the topic or theme of the given news articles based on the titles",
+            "MLSUMClusteringP2P": "Identify the topic or theme of the given articles based on the titles and contents",
+            "MLSUMClusteringS2S":  "Identify the topic or theme of the given articles based on the titles",
+            # MTEB-pl eval instructions
+            "8TagsClustering": "Identify of headlines from social media posts in Polish  into 8 categories: film, history, food, medicine, motorization, work, sport and technology",
+        }
+        return task_name_to_instruct[task_name]
+
+    if task_type in ['Reranking', 'PairClassification']:
+        task_name_to_instruct: Dict[str, str] = {
+            'AskUbuntuDupQuestions': 'Retrieve duplicate questions from AskUbuntu forum',
+            'MindSmallReranking': 'Retrieve relevant news articles based on user browsing history',
+            'SciDocsRR': 'Given a title of a scientific paper, retrieve the titles of other relevant papers',
+            'StackOverflowDupQuestions': 'Retrieve duplicate questions from StackOverflow forum',
+            'SprintDuplicateQuestions': 'Retrieve duplicate questions from Sprint forum',
+            'TwitterSemEval2015': 'Retrieve tweets that are semantically similar to the given tweet',
+            'TwitterURLCorpus': 'Retrieve tweets that are semantically similar to the given tweet',
+            # C-MTEB eval instructions
+            'T2Reranking': 'Given a Chinese search query, retrieve web passages that answer the question',
+            'MmarcoReranking': 'Given a Chinese search query, retrieve web passages that answer the question',
+            'CMedQAv1': 'Given a Chinese community medical question, retrieve replies that best answer the question',
+            'CMedQAv2': 'Given a Chinese community medical question, retrieve replies that best answer the question',
+            'Ocnli': 'Retrieve semantically similar text.',
+            'Cmnli': 'Retrieve semantically similar text.',
+            # MTEB-fr eval instructions
+            "AlloprofReranking": "Given a question, retrieve passages that answer the question",
+            "OpusparcusPC":"Retrieve semantically similar text",
+            "PawsX":"Retrieve semantically similar text",
+            "SyntecReranking": "Given a question, retrieve passages that answer the question",
+            # MTEB-pl eval instructions
+            "SICK-E-PL": "Retrieve semantically similar text",
+            "PPC": "Retrieve semantically similar text",
+            "CDSC-E": "Retrieve semantically similar text",
+            "PSC": "Retrieve semantically similar text",
+        }
+        return task_name_to_instruct[task_name]
+
+    if task_type in ['Retrieval']:
+        if task_name.lower().startswith('cqadupstack'):
+            return 'Given a question, retrieve detailed question descriptions from Stackexchange that are duplicates to the given question'
+
+        task_name_to_instruct: Dict[str, str] = {
+            'ArguAna': 'Given a claim, find documents that refute the claim',
+            'ClimateFEVER': 'Given a claim about climate change, retrieve documents that support or refute the claim',
+            'DBPedia': 'Given a query, retrieve relevant entity descriptions from DBPedia',
+            'FEVER': 'Given a claim, retrieve documents that support or refute the claim',
+            'FiQA2018': 'Given a financial question, retrieve user replies that best answer the question',
+            'HotpotQA': 'Given a multi-hop question, retrieve documents that can help answer the question',
+            'MSMARCO': 'Given a web search query, retrieve relevant passages that answer the query',
+            'NFCorpus': 'Given a question, retrieve relevant documents that best answer the question',
+            'NQ': 'Given a question, retrieve Wikipedia passages that answer the question',
+            'QuoraRetrieval': 'Given a question, retrieve questions that are semantically equivalent to the given question',
+            'SCIDOCS': 'Given a scientific paper title, retrieve paper abstracts that are cited by the given paper',
+            'SciFact': 'Given a scientific claim, retrieve documents that support or refute the claim',
+            'Touche2020': 'Given a question, retrieve detailed and persuasive arguments that answer the question',
+            'TRECCOVID': 'Given a query on COVID-19, retrieve documents that answer the query',
+            # C-MTEB eval instructions
+            'T2Retrieval': 'Given a Chinese search query, retrieve web passages that answer the question',
+            'MMarcoRetrieval': 'Given a web search query, retrieve relevant passages that answer the query',
+            'DuRetrieval': 'Given a Chinese search query, retrieve web passages that answer the question',
+            'CovidRetrieval': 'Given a question on COVID-19, retrieve news articles that answer the question',
+            'CmedqaRetrieval': 'Given a Chinese community medical question, retrieve replies that best answer the question',
+            'EcomRetrieval': 'Given a user query from an e-commerce website, retrieve description sentences of relevant products',
+            'MedicalRetrieval': 'Given a medical question, retrieve user replies that best answer the question',
+            'VideoRetrieval': 'Given a video search query, retrieve the titles of relevant videos',
+            # MTEB-fr eval instructions
+            "AlloprofRetrieval": "Given a question, retrieve passages that answer the question",
+            "BSARDRetrieval": "Given a question, retrieve passages that answer the question",
+            "SyntecRetrieval": "Given a question, retrieve passages that answer the question",
+            "XPQARetrieval": "Given a question, retrieve passages that answer the question",
+            "MintakaRetrieval": "Given a question, retrieve passages that answer the question",
+            # MTEB-pl eval instructions 
+            "ArguAna-PL": "Given a claim, find documents that refute the claim",
+            "DBPedia-PL": "Given a query, retrieve relevant entity descriptions from DBPedia",
+            "FiQA-PL": "Given a financial question, retrieve user replies that best answer the question",
+            "HotpotQA-PL": "Given a multi-hop question, retrieve documents that can help answer the question",
+            "MSMARCO-PL": "Given a web search query, retrieve relevant passages that answer the query",
+            "NFCorpus-PL": "Given a question, retrieve relevant documents that best answer the question",
+            "NQ-PL": "Given a question, retrieve Wikipedia passages that answer the question",
+            "Quora-PL": "Given a question, retrieve questions that are semantically equivalent to the given question",
+            "SCIDOCS-PL": "Given a scientific paper title, retrieve paper abstracts that are cited by the given paper",
+            "SciFact-PL": "Given a scientific claim, retrieve documents that support or refute the claim",
+            "TRECCOVID-PL": "Given a query on COVID-19, retrieve documents that answer the query"
+        }
+
+        # add lower case keys to match some beir names
+        task_name_to_instruct.update({k.lower(): v for k, v in task_name_to_instruct.items()})
+        # other cases where lower case match still doesn't work
+        task_name_to_instruct['trec-covid'] = task_name_to_instruct['TRECCOVID']
+        task_name_to_instruct['climate-fever'] = task_name_to_instruct['ClimateFEVER']
+        task_name_to_instruct['dbpedia-entity'] = task_name_to_instruct['DBPedia']
+        task_name_to_instruct['webis-touche2020'] = task_name_to_instruct['Touche2020']
+        task_name_to_instruct['fiqa'] = task_name_to_instruct['FiQA2018']
+        task_name_to_instruct['quora'] = task_name_to_instruct['QuoraRetrieval']
+
+        # for miracl evaluation
+        task_name_to_instruct['miracl'] = 'Given a question, retrieve Wikipedia passages that answer the question'
+
+        return task_name_to_instruct[task_name]
+    logging.warning(f"No instruction config for task {task_name} with type {task_type}, use default instruction.")
+    return default_instruct 
+
+class Encoder(torch.nn.Module):
+    def __init__(self, name_or_path:str, pooling: str):
+        super().__init__()
+        self.model = AutoModel.from_pretrained(name_or_path, trust_remote_code=True)
+        self.model = self.model.half()
+        self.model.eval()  
+        self.pooling = pooling
+
+    def forward(self, **features) -> torch.Tensor:
+        output = self.model(**features, output_hidden_states=True, return_dict=True)
+        hidden_state = output.hidden_states[-1]        
+        embeddings = self.pooler(hidden_state, **features)
+        return embeddings
+
+    def pooler(
+        self,
+        hidden_state: torch.Tensor,
+        attention_mask: torch.Tensor,
+        **kwargs
+    ) -> torch.Tensor:
+        if attention_mask.ndim == 2:
+            mask_expanded = attention_mask.unsqueeze(-1).expand(hidden_state.size())
+        elif attention_mask.ndim == 3:
+            mask_expanded = attention_mask
+        else:
+            raise RuntimeError(f"Unexpected {attention_mask.ndim=}")
+
+        hidden_state = hidden_state * mask_expanded
+
+        if self.pooling == 'first':
+            pooled_output = hidden_state[:, 0]
+
+        elif self.pooling == 'last':
+            left_padding = (attention_mask[:, -1].sum() == attention_mask.shape[0])
+            if left_padding:
+                return hidden_state[:, -1]
+            else:
+                sequence_lengths = attention_mask.sum(dim=1) - 1
+                batch_size = hidden_state.shape[0]
+            return hidden_state[torch.arange(batch_size, device=hidden_state.device), sequence_lengths]
+        elif self.pooling == 'mean':
+            # TODO: weight
+            lengths = mask_expanded.sum(1).clamp(min=1e-9)
+            pooled_output = hidden_state.sum(dim=1) / lengths
+
+        elif self.pooling == 'weightedmean':
+            input_mask_expanded = attention_mask.unsqueeze(-1).expand(hidden_state.size()).float()
+            # hidden_state shape: bs, seq, hidden_dim
+            weights = (
+                    torch.arange(start=1, end=hidden_state.shape[1] + 1)
+                    .unsqueeze(0)
+                    .unsqueeze(-1)
+                    .expand(hidden_state.size())
+                    .float().to(hidden_state.device)
+                )
+            assert weights.shape == hidden_state.shape == input_mask_expanded.shape
+            input_mask_expanded = input_mask_expanded * weights
+
+            sum_embeddings = torch.sum(hidden_state * input_mask_expanded, 1)
+            sum_mask = input_mask_expanded.sum(1)
+            sum_mask = torch.clamp(sum_mask, min=1e-9)
+            pooled_output = sum_embeddings / sum_mask
+
+        else:
+            raise ValueError(f"Wrong pooler mode : {self.pooling}")
+        return pooled_output
+
+
+class Wrapper:
+    def __init__(
+        self,
+        tokenizer,
+        encoder: Encoder,
+        batch_size: int,
+        max_seq_len: int = 512,
+        normalize_embeddings: bool = False,
+        default_query: bool = False,
+        force_default: bool = False,
+        sep: str = " ",
+        mp_tensor_to_cuda: bool = False,
+        instruction: str = None,
+        attn_type: str = None
+    ):
+        self.tokenizer = tokenizer
+        self.model = encoder
+        self.batch_size = batch_size
+        self.max_seq_len = max_seq_len
+        self.pool: dict = None
+        self.normalize_embeddings = normalize_embeddings
+        self.mp_tensor_to_cuda = mp_tensor_to_cuda
+        self._target_device = torch.device("cuda" if torch.cuda.is_available() else "cpu")
+        self.eod_id = self.tokenizer.convert_tokens_to_ids("<|endoftext|>")
+        self.instruction = instruction
+        self.default_query = default_query
+        self.force_default = force_default
+ 
+        if self.tokenizer.padding_side != 'right':
+            logger.warning(f"Change tokenizer.padding_side from {self.tokenizer.padding_side} to right")
+            self.tokenizer.padding_side = 'right'
+        if self.tokenizer.pad_token is None:
+            logger.warning(f"Set tokenizer.pad_token as eos_token {self.tokenizer.eos_token}")
+            self.tokenizer.pad_token='<|endoftext|>'
+
+    def start(self, target_devices: Optional[List[str]] = None):
+        """
+        Starts multi process to process the encoding with several, independent processes.
+        This method is recommended if you want to encode on multiple GPUs. It is advised
+        to start only one process per GPU. This method works together with encode_multi_process
+
+        :param target_devices: PyTorch target devices, e.g. cuda:0, cuda:1... If None, all available CUDA devices will be used
+        :return: Returns a dict with the target processes, an input queue and and output queue.
+        """
+        if target_devices is None:
+            if torch.cuda.is_available():
+                target_devices = ['cuda:{}'.format(i) for i in range(torch.cuda.device_count())]
+            else:
+                logger.info("CUDA is not available. Start 4 CPU worker")
+                target_devices = ['cpu']*4
+
+        logger.info("Start multi-process pool on devices: {}".format(', '.join(map(str, target_devices))))
+        print('multi instruction', self.instruction)
+        ctx = mp.get_context('spawn')
+        input_queue = ctx.Queue()
+        output_queue = ctx.Queue()
+        processes = []
+
+        for cuda_id in target_devices:
+            p = ctx.Process(
+                target=self._encode_multi_process_worker,
+                args=(cuda_id, self, input_queue, output_queue),
+                daemon=True
+            )
+            p.start()
+            processes.append(p)
+
+        self.pool = {'input': input_queue, 'output': output_queue, 'processes': processes}
+
+    def stop(self):
+        """
+        Stops all processes started with start_multi_process_pool
+        """
+        for p in self.pool['processes']:
+            p.terminate()
+
+        for p in self.pool['processes']:
+            p.join()
+            p.close()
+
+        self.pool['input'].close()
+        self.pool['output'].close()
+
+    @staticmethod
+    def _encode_multi_process_worker(target_device: str, model, input_queue, results_queue):
+        """
+        Internal working process to encode sentences in multi-process setup
+        """
+        while True:
+            try:
+                id, sentences, kwargs = input_queue.get()
+                kwargs.update(device=target_device, show_progress_bar=False, convert_to_numpy=True)
+                embeddings = model._encode(sentences, **kwargs)
+                results_queue.put([id, embeddings])
+            except queue.Empty:
+                break
+
+    def encode_multi_process(
+        self,
+        sentences: List[str],
+        **kwargs
+    ):
+        """
+        This method allows to run encode() on multiple GPUs. The sentences are chunked into smaller packages
+        and sent to individual processes, which encode these on the different GPUs. This method is only suitable
+        for encoding large sets of sentences
+
+        :param sentences: List of sentences
+        :param pool: A pool of workers started with SentenceTransformer.start_multi_process_pool
+        :param chunk_size: Sentences are chunked and sent to the individual processes. If none, it determine a sensible size.
+        :param kwargs: other keyword arguments for model.encode() such as batch_size
+        :return: Numpy matrix with all embeddings
+        """
+        part_size = math.ceil(len(sentences) / len(self.pool["processes"]))
+        chunk_size = part_size if part_size < 3200 else 3200  # for retrieval chunk 50000
+
+        logger.debug(f"Chunk data into {math.ceil(len(sentences) / chunk_size)} packages of size {chunk_size}")
+
+        input_queue = self.pool['input']
+        last_chunk_id = 0
+        chunk = []
+
+        for sentence in sentences:
+            chunk.append(sentence)
+            if len(chunk) >= chunk_size:
+                input_queue.put([last_chunk_id, chunk, kwargs])
+                last_chunk_id += 1
+                chunk = []
+
+        if len(chunk) > 0:
+            input_queue.put([last_chunk_id, chunk, kwargs])
+            last_chunk_id += 1
+
+        output_queue = self.pool['output']
+        results_list = sorted([output_queue.get() for _ in range(last_chunk_id)], key=lambda x: x[0])
+        embeddings = np.concatenate([result[1] for result in results_list])
+        return embeddings
+
+    @staticmethod
+    def batch_to_device(batch, target_device):
+        """
+        send a pytorch batch to a device (CPU/GPU)
+        """
+        for key in batch:
+            if isinstance(batch[key], torch.Tensor):
+                batch[key] = batch[key].to(target_device)
+        return batch
+
+    def _text_length(self, text: Union[List[int], List[List[int]]]):
+        """
+        Help function to get the length for the input text. Text can be either
+        a list of ints (which means a single text as input), or a tuple of list of ints
+        (representing several text inputs to the model).
+        """
+
+        if isinstance(text, dict):              #{key: value} case
+            return len(next(iter(text.values())))
+        elif not hasattr(text, '__len__'):      #Object has no len() method
+            return 1
+        elif len(text) == 0 or isinstance(text[0], int):    #Empty string or list of ints
+            return len(text)
+        else:
+            return sum([len(t) for t in text])      #Sum of length of individual strings
+
+    def _tokenize(self, sentences: List[str], is_query: bool):
+        
+        batch_dict = self.tokenizer(sentences, max_length=self.max_seq_len - 1, return_attention_mask=False, padding=False, truncation=True)
+        batch_dict['input_ids'] = [input_ids + [self.tokenizer.eos_token_id] for input_ids in batch_dict['input_ids']]
+        batch_dict = self.tokenizer.pad(batch_dict, padding=True, return_attention_mask=True, return_tensors='pt')
+        batch_dict['is_causal'] = False
+        return batch_dict
+
+
+    def _encode(
+        self,
+        sentences: List[str],
+        is_query: bool,
+        convert_to_numpy: bool = True,
+        convert_to_tensor: bool = False,
+        device: str = None,
+        show_progress_bar: bool = True,
+        **kwargs
+    ):
+        """
+        Computes sentence embeddings
+
+        :param sentences: the sentences to embed
+        :param batch_size: the batch size used for the computation
+        :param show_progress_bar: Output a progress bar when encode sentences
+        :param output_value:  Default sentence_embedding, to get sentence embeddings. Can be set to token_embeddings to get wordpiece token embeddings. Set to None, to get all output values
+        :param convert_to_numpy: If true, the output is a list of numpy vectors. Else, it is a list of pytorch tensors.
+        :param convert_to_tensor: If true, you get one large tensor as return. Overwrites any setting from convert_to_numpy
+        :param device: Which torch.device to use for the computation
+        :param normalize_embeddings: If set to true, returned vectors will have length 1. In that case, the faster dot-product (util.dot_score) instead of cosine similarity can be used.
+
+        :return:
+           By default, a list of tensors is returned. If convert_to_tensor, a stacked tensor is returned. If convert_to_numpy, a numpy matrix is returned.
+        """
+        self.model.eval()
+
+        if convert_to_tensor:
+            convert_to_numpy = False
+
+        input_was_string = False
+        if isinstance(sentences, str) or not hasattr(sentences, '__len__'): #Cast an individual sentence to a list with length 1
+            sentences = [sentences]
+            input_was_string = True
+
+        if device is None:
+            device = self._target_device
+
+        self.model.to(device)
+
+        all_embeddings = []
+        length_sorted_idx = np.argsort([-self._text_length(s) for s in sentences])
+        sentences_sorted = [sentences[idx] for idx in length_sorted_idx]
+
+        for start_index in trange(0, len(sentences), self.batch_size, desc="Batches", disable=not show_progress_bar):
+            sentences_batch = sentences_sorted[start_index:start_index + self.batch_size]
+            features = self._tokenize(sentences_batch, is_query)
+            features = self.batch_to_device(features, device)
+
+            with torch.no_grad():
+                embeddings = self.model(**features)
+
+                if self.normalize_embeddings:
+                    embeddings = torch.nn.functional.normalize(embeddings, p=2, dim=1)
+
+                # fixes for #522 and #487 to avoid oom problems on gpu with large datasets
+                if convert_to_numpy:
+                    embeddings = embeddings.cpu()
+
+                all_embeddings.extend(embeddings)
+
+        all_embeddings = [all_embeddings[idx] for idx in np.argsort(length_sorted_idx)]
+
+        if convert_to_tensor:
+            all_embeddings = torch.stack(all_embeddings)
+        elif convert_to_numpy:
+            #all_embeddings = np.asarray([emb.numpy() for emb in all_embeddings])
+            all_embeddings = np.asarray([emb.to(torch.float).numpy() for emb in all_embeddings])
+        if input_was_string:
+            all_embeddings = all_embeddings[0]
+
+        return all_embeddings
+
+    def encode(
+        self,
+        sentences: List[str],
+        is_query: Optional[bool] = None,
+        convert_to_tensor: bool = False,
+        **kwargs
+    ):
+        is_query = self.default_query if is_query is None else is_query
+        if is_query and self.instruction:
+           sentences = [self.instruction + sent for sent in sentences]
+        kwargs.update(is_query=is_query)
+        if self.pool is not None:
+            kwargs.update(show_progress_bar=False)
+            embeddings = self.encode_multi_process(sentences, **kwargs)
+            if convert_to_tensor:
+                embeddings = torch.from_numpy(embeddings)
+                if self.mp_tensor_to_cuda and torch.cuda.is_available():
+                    embeddings = embeddings.to(torch.device('cuda'))  # default 0-th gpu
+            return embeddings
+
+        return self._encode(sentences, convert_to_tensor=convert_to_tensor, **kwargs)
+
+    def encode_queries(self, queries: List[str], **kwargs):
+        is_query = self.default_query if self.force_default else True
+        return self.encode(queries, is_query=is_query, **kwargs)
+
+    def encode_corpus(self, corpus: List[Dict[str, str]], **kwargs):
+        # borrowed from mteb.abstasks.AbsTaskRetrieval.DRESModel
+        if type(corpus) is dict:
+            sentences = [
+                (corpus["title"][i] + self.sep + corpus["text"][i]).strip()
+                if "title" in corpus
+                else corpus["text"][i].strip()
+                for i in range(len(corpus["text"]))
+            ]
+        elif isinstance(corpus[0], dict):
+            sentences = [
+                (doc["title"] + self.sep + doc["text"]).strip() if "title" in doc else doc["text"].strip()
+                for doc in corpus
+            ]
+        else:
+            sentences = corpus
+        is_query = self.default_query if self.force_default else False
+        return self.encode(sentences, is_query=is_query, **kwargs)
+
+def main(args):
+    tokenizer = AutoTokenizer.from_pretrained(args.model, trust_remote_code=True)
+    encoder = Encoder(args.model, args.pooling)
+    model = Wrapper(
+        tokenizer, encoder,
+        batch_size=args.batch_size,
+        max_seq_len=args.max_seq_len,
+        normalize_embeddings=args.norm
+    )
+    
+    if args.task == 'mteb':
+        task_names = MTEB_TASK_LIST
+        lang = ['en']
+    elif args.task == 'cmteb':
+        task_names = CMTEB_TASK_LIST
+        lang = ['zh','zh-CN']
+    elif args.task == 'mteb-fr':
+        tas_names = MTEB_FR
+        lang = ['fr']
+    elif args.task == 'mteb-pl':
+        lang = ['pl']
+    else:
+        task_names = [args.task]
+        lang = ['en','zh','zh-CN','pl','fr']
+    for task in task_names:
+        evaluation = MTEB(tasks=[task], task_langs=lang)
+        task_cls = evaluation.tasks[0]
+        task_name: str = task_cls.description['name']
+        task_type: str = task_cls.description['type']
+        instruction = get_task_def_by_task_name_and_type(task_name, task_type)
+        model.instruction = get_detailed_instruct(instruction)
+        if task == 'MSMARCO':
+            eval_splits = ["dev"]
+        elif task in CMTEB_TASK_LIST:
+            eval_splits = task_cls.description['eval_splits']
+        else:
+            eval_splits = ["test"]
+
+        evaluation.run(model, output_folder=args.output_dir, eval_splits=eval_splits)
+        print('\n')
+
+
+if __name__ == "__main__":
+    _PARSER = argparse.ArgumentParser()
+    _PARSER.add_argument(
+        "-m", "--model", type=str, default=None
+    )
+    _PARSER.add_argument("--pooling", type=str, default='last')
+    _PARSER.add_argument("--output_dir", type=str, default=None)
+    _PARSER.add_argument("--default_type", type=str, default='query')
+    _PARSER.add_argument("--max_seq_len", type=int, default=512)
+    _PARSER.add_argument("-b", "--batch_size", type=int, default=32)
+    _PARSER.add_argument(
+        "-t", "--task", type=str, default=None  # None for running default tasks
+    )
+    _PARSER.add_argument("--norm", action="store_true")
+    _ARGS = _PARSER.parse_args()
+    main(_ARGS)

sentence_bert_config.json

@@ -0,0 +1,4 @@
+{
+  "max_seq_length": 32768,
+  "do_lower_case": false
+}

special_tokens_map.json

@@ -0,0 +1,20 @@
+{
+  "additional_special_tokens": [
+    "<|im_start|>",
+    "<|im_end|>"
+  ],
+  "eos_token": {
+    "content": "<|endoftext|>",
+    "lstrip": false,
+    "normalized": false,
+    "rstrip": false,
+    "single_word": false
+  },
+  "pad_token": {
+    "content": "<|endoftext|>",
+    "lstrip": false,
+    "normalized": false,
+    "rstrip": false,
+    "single_word": false
+  }
+}

tokenization_qwen.py

@@ -0,0 +1,267 @@
+
+from typing import List, Optional
+from transformers.models.qwen2.tokenization_qwen2 import Qwen2Tokenizer as OriginalQwen2Tokenizer
+from transformers.models.qwen2.tokenization_qwen2_fast import Qwen2TokenizerFast as OriginalQwen2TokenizerFast
+from tokenizers import processors
+
+VOCAB_FILES_NAMES = {
+    "vocab_file": "vocab.json",
+    "merges_file": "merges.txt",
+    "tokenizer_file": "tokenizer.json",
+}
+
+class Qwen2Tokenizer(OriginalQwen2Tokenizer):
+    """
+    Construct a Qwen2 tokenizer. Based on byte-level Byte-Pair-Encoding.
+
+    Same with GPT2Tokenizer, this tokenizer has been trained to treat spaces like parts of the tokens so a word will
+    be encoded differently whether it is at the beginning of the sentence (without space) or not:
+
+    ```python
+    >>> from transformers import Qwen2Tokenizer
+
+    >>> tokenizer = Qwen2Tokenizer.from_pretrained("Qwen/Qwen-tokenizer")
+    >>> tokenizer("Hello world")["input_ids"]
+    [9707, 1879]
+
+    >>> tokenizer(" Hello world")["input_ids"]
+    [21927, 1879]
+    ```
+    This is expected.
+
+    You should not use GPT2Tokenizer instead, because of the different pretokenization rules.
+
+    This tokenizer inherits from [`PreTrainedTokenizer`] which contains most of the main methods. Users should refer to
+    this superclass for more information regarding those methods.
+
+    Args:
+        vocab_file (`str`):
+            Path to the vocabulary file.
+        merges_file (`str`):
+            Path to the merges file.
+        errors (`str`, *optional*, defaults to `"replace"`):
+            Paradigm to follow when decoding bytes to UTF-8. See
+            [bytes.decode](https://docs.python.org/3/library/stdtypes.html#bytes.decode) for more information.
+        unk_token (`str`, *optional*, defaults to `"<|endoftext|>"`):
+            The unknown token. A token that is not in the vocabulary cannot be converted to an ID and is set to be this
+            token instead.
+        bos_token (`str`, *optional*):
+            The beginning of sequence token. Not applicable for this tokenizer.
+        eos_token (`str`, *optional*, defaults to `"<|endoftext|>"`):
+            The end of sequence token.
+        pad_token (`str`, *optional*, defaults to `"<|endoftext|>"`):
+            The token used for padding, for example when batching sequences of different lengths.
+        clean_up_tokenization_spaces (`bool`, *optional*, defaults to `False`):
+            Whether or not the model should cleanup the spaces that were added when splitting the input text during the
+            tokenization process. Not applicable to this tokenizer, since tokenization does not add spaces.
+        split_special_tokens (`bool`, *optional*, defaults to `False`):
+            Whether or not the special tokens should be split during the tokenization process. The default behavior is
+            to not split special tokens. This means that if `<|endoftext|>` is the `eos_token`, then `tokenizer.tokenize("<|endoftext|>") =
+            ['<|endoftext|>`]. Otherwise, if `split_special_tokens=True`, then `tokenizer.tokenize("<|endoftext|>")` will be give `['<',
+            '|', 'endo', 'ft', 'ext', '|', '>']`. This argument is only supported for `slow` tokenizers for the moment.
+        add_eos_token (`bool`, *optional*, defaults to `False`):
+            Whether or not to add an `eos_token` at the end of sequences.
+    """
+
+    def __init__(
+        self,
+        vocab_file,
+        merges_file,
+        errors="replace",
+        unk_token="<|endoftext|>",
+        bos_token=None,
+        eos_token="<|endoftext|>",
+        pad_token="<|endoftext|>",
+        clean_up_tokenization_spaces=False,
+        split_special_tokens=False,
+        add_eos_token=False,
+        **kwargs,
+    ):
+        # The add_eos_token code was inspired by the LlamaTokenizer
+        self.add_eos_token = add_eos_token
+
+        super().__init__(
+            vocab_file=vocab_file,
+            merges_file=merges_file,
+            errors=errors,
+            unk_token=unk_token,
+            bos_token=bos_token,
+            eos_token=eos_token,
+            pad_token=pad_token,
+            clean_up_tokenization_spaces=clean_up_tokenization_spaces,
+            split_special_tokens=split_special_tokens,
+            add_eos_token=add_eos_token,
+            **kwargs,
+        )
+
+    def build_inputs_with_special_tokens(self, token_ids_0, token_ids_1=None):
+        eos_token_id = [self.eos_token_id] if self.add_eos_token else []
+
+        output = token_ids_0 + eos_token_id
+
+        if token_ids_1 is not None:
+            output = output + token_ids_1 + eos_token_id
+
+        return output
+
+    def get_special_tokens_mask(
+        self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None, already_has_special_tokens: bool = False
+    ) -> List[int]:
+        """
+        Retrieve sequence ids from a token list that has no special tokens added. This method is called when adding
+        special tokens using the tokenizer `prepare_for_model` method.
+
+        Args:
+            token_ids_0 (`List[int]`):
+                List of IDs.
+            token_ids_1 (`List[int]`, *optional*):
+                Optional second list of IDs for sequence pairs.
+            already_has_special_tokens (`bool`, *optional*, defaults to `False`):
+                Whether or not the token list is already formatted with special tokens for the model.
+
+        Returns:
+            `List[int]`: A list of integers in the range [0, 1]: 1 for a special token, 0 for a sequence token.
+        """
+        if already_has_special_tokens:
+            return super().get_special_tokens_mask(
+                token_ids_0=token_ids_0, token_ids_1=token_ids_1, already_has_special_tokens=True
+            )
+
+        eos_token_id = [1] if self.add_eos_token else []
+
+        if token_ids_1 is None:
+            return ([0] * len(token_ids_0)) + eos_token_id
+        return (
+            ([0] * len(token_ids_0))
+            + eos_token_id
+            + ([0] * len(token_ids_1))
+            + eos_token_id
+        )
+
+    def create_token_type_ids_from_sequences(
+        self, token_ids_0: List[int], token_ids_1: Optional[List[int]] = None
+    ) -> List[int]:
+        """
+        Creates a mask from the two sequences passed to be used in a sequence-pair classification task. An ALBERT
+        sequence pair mask has the following format:
+
+        ```
+        0 0 0 0 0 0 0 0 0 0 0 1 1 1 1 1 1 1 1 1
+        | first sequence    | second sequence |
+        ```
+
+        if token_ids_1 is None, only returns the first portion of the mask (0s).
+
+        Args:
+            token_ids_0 (`List[int]`):
+                List of ids.
+            token_ids_1 (`List[int]`, *optional*):
+                Optional second list of IDs for sequence pairs.
+
+        Returns:
+            `List[int]`: List of [token type IDs](../glossary#token-type-ids) according to the given sequence(s).
+        """
+        eos_token_id = [self.eos_token_id] if self.add_eos_token else []
+
+        output = [0] * len(token_ids_0 + eos_token_id)
+
+        if token_ids_1 is not None:
+            output += [1] * len(token_ids_1 + eos_token_id)
+
+        return output
+
+class Qwen2TokenizerFast(OriginalQwen2TokenizerFast):
+    """
+    Construct a "fast" Qwen2 tokenizer (backed by HuggingFace's *tokenizers* library). Based on byte-level
+    Byte-Pair-Encoding.
+
+    Same with GPT2Tokenizer, this tokenizer has been trained to treat spaces like parts of the tokens so a word will
+    be encoded differently whether it is at the beginning of the sentence (without space) or not:
+
+    ```python
+    >>> from transformers import Qwen2TokenizerFast
+
+    >>> tokenizer = Qwen2TokenizerFast.from_pretrained("Qwen/Qwen-tokenizer")
+    >>> tokenizer("Hello world")["input_ids"]
+    [9707, 1879]
+
+    >>> tokenizer(" Hello world")["input_ids"]
+    [21927, 1879]
+    ```
+    This is expected.
+
+    This tokenizer inherits from [`PreTrainedTokenizerFast`] which contains most of the main methods. Users should
+    refer to this superclass for more information regarding those methods.
+
+    Args:
+        vocab_file (`str`, *optional*):
+            Path to the vocabulary file.
+        merges_file (`str`, *optional*):
+            Path to the merges file.
+        tokenizer_file (`str`, *optional*):
+            Path to [tokenizers](https://github.com/huggingface/tokenizers) file (generally has a .json extension) that
+            contains everything needed to load the tokenizer.
+        unk_token (`str`, *optional*, defaults to `"<|endoftext|>"`):
+            The unknown token. A token that is not in the vocabulary cannot be converted to an ID and is set to be this
+            token instead. Not applicable to this tokenizer.
+        bos_token (`str`, *optional*):
+            The beginning of sequence token. Not applicable for this tokenizer.
+        eos_token (`str`, *optional*, defaults to `"<|endoftext|>"`):
+            The end of sequence token.
+        pad_token (`str`, *optional*, defaults to `"<|endoftext|>"`):
+            The token used for padding, for example when batching sequences of different lengths.
+        add_eos_token (`bool`, *optional*, defaults to `False`):
+            Whether or not to add an `eos_token` at the end of sequences.
+    """
+
+    slow_tokenizer_class = Qwen2Tokenizer
+    padding_side = "left"
+
+    def __init__(
+        self,
+        vocab_file=None,
+        merges_file=None,
+        tokenizer_file=None,
+        unk_token="<|endoftext|>",
+        bos_token=None,
+        eos_token="<|endoftext|>",
+        pad_token="<|endoftext|>",
+        add_eos_token=False,
+        **kwargs,
+    ):
+        super().__init__(
+            vocab_file=vocab_file,
+            merges_file=merges_file,
+            tokenizer_file=tokenizer_file,
+            unk_token=unk_token,
+            bos_token=bos_token,
+            eos_token=eos_token,
+            pad_token=pad_token,
+            **kwargs,
+        )
+
+        self._add_eos_token = add_eos_token
+        self.update_post_processor()
+
+    def update_post_processor(self):
+        """
+        Updates the underlying post processor with the current `eos_token`.
+        """
+        eos = self.eos_token
+        eos_token_id = self.eos_token_id
+        if eos is None and self.add_eos_token:
+            raise ValueError("add_eos_token = True but eos_token = None")
+
+        single = f"$A:0{(' '+eos+':0') if self.add_eos_token else ''}"
+        pair = f"{single} $B:1{(' '+eos+':1') if self.add_eos_token else ''}"
+
+        special_tokens = []
+        if self.add_eos_token:
+            special_tokens.append((eos, eos_token_id))
+        self._tokenizer.post_processor = processors.TemplateProcessing(
+            single=single, pair=pair, special_tokens=special_tokens
+        )
+
+    @property
+    def add_eos_token(self):
+        return self._add_eos_token

tokenizer_config.json

@@ -0,0 +1,47 @@
+{
+  "add_eos_token": true,
+  "add_prefix_space": false,
+  "added_tokens_decoder": {
+    "151643": {
+      "content": "<|endoftext|>",
+      "lstrip": false,
+      "normalized": false,
+      "rstrip": false,
+      "single_word": false,
+      "special": true
+    },
+    "151644": {
+      "content": "<|im_start|>",
+      "lstrip": false,
+      "normalized": false,
+      "rstrip": false,
+      "single_word": false,
+      "special": true
+    },
+    "151645": {
+      "content": "<|im_end|>",
+      "lstrip": false,
+      "normalized": false,
+      "rstrip": false,
+      "single_word": false,
+      "special": true
+    }
+  },
+  "additional_special_tokens": [
+    "<|im_start|>",
+    "<|im_end|>"
+  ],
+  "auto_map": {
+    "AutoTokenizer": ["tokenization_qwen.Qwen2Tokenizer", "tokenization_qwen.Qwen2TokenizerFast"]
+  },
+  "bos_token": null,
+  "chat_template": "{% for message in messages %}{{'<|im_start|>' + message['role'] + '\n' + message['content'] + '<|im_end|>' + '\n'}}{% endfor %}{% if add_generation_prompt %}{{ '<|im_start|>assistant\n' }}{% endif %}",
+  "clean_up_tokenization_spaces": false,
+  "eos_token": "<|endoftext|>",
+  "errors": "replace",
+  "model_max_length": 32768,
+  "pad_token": "<|endoftext|>",
+  "split_special_tokens": false,
+  "tokenizer_class": "Qwen2Tokenizer",
+  "unk_token": null
+}