app.py

import spaces
import gradio as gr
from transformers import Trainer, TrainingArguments, AutoTokenizer, AutoModelForSeq2SeqLM
from transformers import DataCollatorForSeq2Seq
from datasets import load_dataset, concatenate_datasets, load_from_disk
import traceback


import os
from huggingface_hub import login

@spaces.GPU
def fine_tune_model(model_name, dataset_name, hub_id, api_key, num_epochs, batch_size, lr, grad):
    try:
        #login(api_key.strip())
        # Load the model and tokenizer
        model = AutoModelForSeq2SeqLM.from_pretrained(model_name.strip(), num_labels=2)
        
    
        # Set training arguments
        training_args = TrainingArguments(
            output_dir='/data/results',
            eval_strategy="steps",  # Change this to steps
            save_strategy='steps',
            learning_rate=lr*0.00001,
            per_device_train_batch_size=int(batch_size),
            per_device_eval_batch_size=int(batch_size), 
            num_train_epochs=int(num_epochs),
            weight_decay=0.01,
            gradient_accumulation_steps=int(grad),
            max_grad_norm = 1.0, 
            load_best_model_at_end=True,
            metric_for_best_model="accuracy",
            greater_is_better=True,
            logging_dir='/data/logs',
            logging_steps=10,
            #push_to_hub=True,
            hub_model_id=hub_id.strip(),
            fp16=True,
            #lr_scheduler_type='cosine',
            save_steps=100,  # Save checkpoint every 500 steps
            save_total_limit=3, 
        )
        # Check if a checkpoint exists and load it
        max_length = 128
        # Load the dataset
        dataset = load_dataset(dataset_name.strip())
        tokenizer = AutoTokenizer.from_pretrained(model_name)
        # Tokenize the dataset
        def tokenize_function(examples):
            
            # Assuming 'text' is the input and 'target' is the expected output
            model_inputs = tokenizer(
                examples['text'], 
                max_length=max_length,  # Set to None for dynamic padding
                padding=True,     # Disable padding here, we will handle it later
                truncation=True,
            )
        
            # Setup the decoder input IDs (shifted right)
            labels = tokenizer(
                examples['target'], 
                max_length=max_length,  # Set to None for dynamic padding
                padding=True,     # Disable padding here, we will handle it later
                truncation=True,
                text_target=examples['target']  # Use text_target for target text
            )
        
            # Add labels to the model inputs
            model_inputs["labels"] = labels["input_ids"]
        
        
        tokenized_datasets = dataset.map(tokenize_function, batched=True)
        
        tokenized_datasets['train'].save_to_disk(f'/data/{hub_id.strip()}_train_dataset')
        tokenized_datasets['test'].save_to_disk(f'/data/{hub_id.strip()}_test_dataset')
    
        # Create Trainer
        trainer = Trainer(
            model=model,
            args=training_args,
            train_dataset=tokenized_datasets['train'],
            eval_dataset=tokenized_datasets['test'],
            compute_metrics=compute_metrics,
            #callbacks=[LoggingCallback()], 
        )            

        # Fine-tune the model
        trainer.train()
        trainer.push_to_hub(commit_message="Training complete!")
    except Exception as e:
        return f"An error occurred: {str(e)}, TB: {traceback.format_exc()}"
    return 'DONE!'#model
'''
# Define Gradio interface
def predict(text):
    model = AutoModelForSeq2SeqLM.from_pretrained(model_name.strip(), num_labels=2)
    tokenizer = AutoTokenizer.from_pretrained(model_name)
    inputs = tokenizer(text, return_tensors="pt", padding=True, truncation=True)
    outputs = model(inputs)
    predictions = outputs.logits.argmax(dim=-1)
    return predictions.item()
'''
# Create Gradio interface
try:
    iface = gr.Interface(
        fn=fine_tune_model,
        inputs=[
            gr.Textbox(label="Model Name (e.g., 'google/t5-efficient-tiny-nh8')"),
            gr.Textbox(label="Dataset Name (e.g., 'imdb')"),
            gr.Textbox(label="HF hub to push to after training"),
            gr.Textbox(label="HF API token"),
            gr.Slider(minimum=1, maximum=10, value=3, label="Number of Epochs", step=1),
            gr.Slider(minimum=1, maximum=2000, value=1, label="Batch Size", step=1),
            gr.Slider(minimum=1, maximum=1000, value=1, label="Learning Rate (e-5)", step=1),
            gr.Slider(minimum=1, maximum=100, value=1, label="Gradient accumulation", step=1), 
        ],
        outputs="text",
        title="Fine-Tune Hugging Face Model",
        description="This interface allows you to fine-tune a Hugging Face model on a specified dataset."
    )
    '''
    iface = gr.Interface(
        fn=predict,
        inputs=[
            gr.Textbox(label="Query"),
        ],
        outputs="text",
        title="Fine-Tune Hugging Face Model",
        description="This interface allows you to test a fine-tune Hugging Face model."
    )
    '''
    # Launch the interface
    iface.launch()    
except Exception as e:
    print(f"An error occurred: {str(e)}, TB: {traceback.format_exc()}")