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# Tamil-Transformer
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This repository is created as part of the Flax/Jax community week by Huggingface. The aim of this project is to pretrain a language model using GPT-2 specifically for Tamil language.
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## Setup:
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To setup the project, run the following command,
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```python
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pip install -r requirements.txt
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```
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## Model:
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Pretrained model on Tamil language using a causal language modeling (CLM) objective.
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## Dataset Used:
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The GTP-2 model is trained on [oscar dataset - ta](https://huggingface.co/datasets/oscar) and [IndicNLP dataset - ta](https://indicnlp.ai4bharat.org/corpora/)
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## Intended uses & limitations:
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You can use the raw model for next sentence prediction, but it's mostly intended to be fine-tuned on a downstream task. See the [model hub](https://huggingface.co/models?filter=gpt2) to look for fine-tuned versions on a task that interests you.
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## How to pretrain the model:
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To perform training, do the following steps,
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- Export the model directory (where you want to store the model artifacts like config, tokenizer, etc.)
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```python
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>>> export MODEL_DIR=<model_dir>
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```
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- Create the config.json by running the following command,
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```python
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>>> python src/create_config.py
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```
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- Create the tokenizer by running the following command,
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```python
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>>> python src/train_tokenizer.py
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```
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- Once the config and tokenizer is created, run the following script to start training the flax model
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```python
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>>> python scripts/train_gpt2-oscar-tamil.sh
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```
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## How to use:
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To perform language generation using the model, pipeline can be used directly.
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- First convert the flax model to pytorch using the following command,
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```python
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python src/convert_flax_to_pytorch.py
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```
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- Use the following snippet to perform language generation,
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```python
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>>> from transformers import AutoTokenizer, AutoModelWithLMHead, pipeline
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>>> model_name = 'Abinesh/Tamil-Transformer'
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>>> model = AutoModelWithLMHead.from_pretrained(model_name)
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>>> tokenizer = AutoTokenizer.from_pretrained(model_name)
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>>> set_seed(42)
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>>> input_text = "ஒரு ஊரிலே ஒரு காக்கைக்கு"
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>>> max_len = 300
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>>> no_seq = 5
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>>> generator = pipeline('text-generation', model=model, tokenizer=tokenizer)
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>>> sequence = generator(input_text, max_length=max_len, num_return_sequences=no_seq)
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```
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# Tamil-Transformer
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