Create app.py

app.py

@@ -0,0 +1,99 @@
+import gradio as gr
+import torch
+from transformers import AutoModelForCausalLM, AutoTokenizer, pipeline, StoppingCriteria, StoppingCriteriaList
+import time
+import numpy as np
+from torch.nn import functional as F
+
+
+m = AutoModelForCausalLM.from_pretrained("/mnt/nvme/home/dakota/ckpts/stablelm/7B-sft-combined/checkpoint-8000", torch_dtype=torch.float16).cuda()
+tok = AutoTokenizer.from_pretrained("/mnt/nvme/home/dakota/stablelm_tokenizer")
+generator = pipeline('text-generation', model=m, tokenizer=tok, device=0)
+
+
+start_message = """<|SYSTEM|># StableAssistant
+- StableAssistant is A helpful and harmless Open Source AI Language Model developed by Stability and CarperAI.
+- StableAssistant is excited to be able to help the user, but will refuse to do anything that could be considered harmful to the user.
+- StableAssistant is more than just an information source, StableAssistant is also able to write poetry, short stories, and make jokes.
+- StableAssistant will refuse to participate in anything that could harm a human."""
+
+
+class StopOnTokens(StoppingCriteria):
+    def __call__(self, input_ids: torch.LongTensor, scores: torch.FloatTensor, **kwargs) -> bool:
+        stop_ids = [50278, 50279, 50277, 1, 0]
+        for stop_id in stop_ids:
+            if input_ids[0][-1] == stop_id:
+                return True
+        return False
+
+
+def contrastive_generate(text, bad_text):
+    with torch.no_grad():
+        tokens = tok(text, return_tensors="pt")['input_ids'].cuda()[:,:4096-1024]
+        bad_tokens = tok(bad_text, return_tensors="pt")['input_ids'].cuda()[:,:4096-1024]
+        history = None
+        bad_history = None
+        curr_output = list()
+        for i in range(1024):
+            out = m(tokens, past_key_values=history, use_cache=True)
+            logits = out.logits
+            history = out.past_key_values
+            bad_out = m(bad_tokens, past_key_values=bad_history, use_cache=True)
+            bad_logits = bad_out.logits
+            bad_history = bad_out.past_key_values
+            probs = F.softmax(logits.float(), dim=-1)[0][-1].cpu()
+            bad_probs = F.softmax(bad_logits.float(), dim=-1)[0][-1].cpu()
+            logits = torch.log(probs)
+            bad_logits = torch.log(bad_probs)
+            logits[probs > 0.1] = logits[probs > 0.1] - bad_logits[probs > 0.1]
+            probs = F.softmax(logits)
+            out = int(torch.multinomial(probs, 1))
+            if out in [50278, 50279, 50277, 1, 0]:
+                break
+            else:
+                curr_output.append(out)
+            out = np.array([out])
+            tokens = torch.from_numpy(np.array([out])).to(
+                tokens.device)
+            bad_tokens = torch.from_numpy(np.array([out])).to(
+                tokens.device)
+        return tok.decode(curr_output)
+
+def generate(text, bad_text=None):
+    stop = StopOnTokens()
+    result = generator(text, max_new_tokens=1024, num_return_sequences=1, num_beams=1, do_sample=True, temperature=1.0, top_p=0.95, top_k=1000, stopping_criteria=StoppingCriteriaList([stop]))
+    return result[0]["generated_text"].replace(text, "")
+
+
+def user(user_message, history):
+    return "", history + [[user_message, ""]]
+
+
+def bot(history, curr_system_message):
+    messages = curr_system_message + "".join(["".join(["<|USER|>"+item[0], "<|ASSISTANT|>"+item[1]]) for item in history])
+    output = generate(messages)
+    history[-1][1] = output
+    time.sleep(1)
+    return history
+
+
+def system_update(msg):
+    global curr_system_message
+    curr_system_message = msg
+
+
+with gr.Blocks() as demo:
+    with gr.Row():
+        with gr.Column():
+            chatbot = gr.Chatbot([])
+            clear = gr.Button("Clear")
+        with gr.Column():
+            system_msg = gr.Textbox(start_message, label="System Message", interactive=True)
+            msg = gr.Textbox(label="Chat Message")
+
+    msg.submit(user, [msg, chatbot], [msg, chatbot], queue=False).then(
+        bot, [chatbot, system_msg], chatbot
+    )
+    system_msg.change(system_update, system_msg, None, queue=False)
+    clear.click(lambda: None, None, chatbot, queue=False)
+demo.launch(share=True)