app.py

import spaces
import glob
import gradio as gr
from transformers import Trainer, TrainingArguments, AutoTokenizer, AutoModelForSeq2SeqLM
from transformers import DataCollatorForSeq2Seq, AutoConfig
from datasets import load_dataset, concatenate_datasets, load_from_disk, DatasetDict
import traceback
from sklearn.metrics import accuracy_score
import numpy as np
import torch
import os
import evaluate
from huggingface_hub import login
from peft import get_peft_model, LoraConfig

os.environ['HF_HOME'] = '/data/.huggingface'
'''
lora_config = LoraConfig(
    r=16,  # Rank of the low-rank adaptation
    lora_alpha=32,  # Scaling factor
    lora_dropout=0.1,  # Dropout for LoRA layers
    bias="none"  # Bias handling
)
model = AutoModelForSeq2SeqLM.from_pretrained('google/t5-efficient-tiny', num_labels=2, force_download=True)
model = get_peft_model(model, lora_config)
model.gradient_checkpointing_enable()
model_save_path = '/data/lora_finetuned_model'  # Specify your desired save path
model.save_pretrained(model_save_path)
'''

def fine_tune_model(model, dataset_name, hub_id, api_key, num_epochs, batch_size, lr, grad):
    try:
        torch.cuda.empty_cache()
        torch.nn.CrossEntropyLoss()
        #rouge_metric = evaluate.load("rouge", cache_dir='/data/cache')
        #def compute_metrics(eval_preds):
            #preds, labels = eval_preds
            #if isinstance(preds, tuple):
                #preds = preds[0]
            #from pprint import pprint as pp
            #pp(preds)
            ## Replace -100s used for padding as we can't decode them
            #preds = np.where(preds != -100, preds, tokenizer.pad_token_id)
            #labels = np.where(labels != -100, labels, tokenizer.pad_token_id)
        
            ## Decode predictions and labels
            #decoded_preds = tokenizer.batch_decode(preds, skip_special_tokens=True)
            #decoded_labels = tokenizer.batch_decode(labels, skip_special_tokens=True)
        
            ## Compute ROUGE metrics
            #result = rouge_metric.compute(predictions=decoded_preds, references=decoded_labels)
            #result = {k: round(v * 100, 4) for k, v in result.items()}
        
            ## Calculate accuracy
            #accuracy = accuracy_score(decoded_labels, decoded_preds)
            #result["eval_accuracy"] = round(accuracy * 100, 4)
        
            ## Calculate average generation length
            #prediction_lens = [np.count_nonzero(pred != tokenizer.pad_token_id) for pred in preds]
            #result["gen_len"] = np.mean(prediction_lens)
        
            #return result
        
        login(api_key.strip())
   
    
        # Load the model and tokenizer
                 
        # 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 = 3.0, 
            load_best_model_at_end=True,
            metric_for_best_model="loss",
            greater_is_better=True,
            logging_dir='/data/logs',
            logging_steps=200,
            #push_to_hub=True,
            hub_model_id=hub_id.strip(),
            fp16=True,
            #lr_scheduler_type='cosine',
            save_steps=200,  # Save checkpoint every 500 steps
            save_total_limit=3, 
        )
        # Check if a checkpoint exists and load it
        #if os.path.exists(training_args.output_dir) and os.listdir(training_args.output_dir):
            #print("Loading model from checkpoint...")
            #model = AutoModelForSeq2SeqLM.from_pretrained(training_args.output_dir)        
        tokenizer = AutoTokenizer.from_pretrained('google/t5-efficient-tiny-nh8', use_fast=True, trust_remote_code=True)
    
        #max_length = model.get_input_embeddings().weight.shape[0]
        max_length = 512
    
        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
                truncation=True,
                padding='max_length',
                #return_tensors='pt',
                #padding=True, 
            )
        
            # Setup the decoder input IDs (shifted right)
            with tokenizer.as_target_tokenizer():
                labels = tokenizer(
                    examples['target'], 
                    max_length=max_length,  # Set to None for dynamic padding
                    truncation=True,
                    padding='max_length',
                    #text_target=examples['target'],
                    #return_tensors='pt',
                    #padding=True, 
                )
            #labels["input_ids"] = [
             #   [(l if l != tokenizer.pad_token_id else -100) for l in label] for label in labels["input_ids"]
            #]        
            # Add labels to the model inputs
            model_inputs["labels"] = labels["input_ids"]
            return model_inputs
    
        #max_length = 512
        # Load the dataset        
        column_names = ['text', 'target']
        
        try:
            saved_dataset = load_from_disk(f'/data/{hub_id.strip()}_train_dataset')
            if os.access(f'/data/{hub_id.strip()}_test_dataset', os.R_OK):
                train_dataset = load_from_disk(f'/data/{hub_id.strip()}_train_dataset3')
                saved_test_dataset = load_from_disk(f'/data/{hub_id.strip()}_validation_dataset')
                dataset = load_dataset(dataset_name.strip())
                print("FOUND TEST")                    
                # Create Trainer
                data_collator = DataCollatorForSeq2Seq(tokenizer, model=model)
                trainer = Trainer(
                    model=model,
                    args=training_args,
                    train_dataset=train_dataset,
                    eval_dataset=saved_test_dataset,
                    #compute_metrics=compute_metrics,
                    #data_collator=data_collator,
                    #processing_class=tokenizer,
                )
            
            elif os.access(f'/data/{hub_id.strip()}_train_dataset3', os.R_OK):                        
                dataset = load_dataset(dataset_name.strip())
                #dataset['test'] = dataset['test'].select(range(700))
                dataset['test'] = dataset['test'].select(range(50))
                del dataset['train']
                del dataset['validation']
                test_set = dataset.map(tokenize_function, batched=True)
                test_set['test'].save_to_disk(f'/data/{hub_id.strip()}_test_dataset')
                return 'TRAINING DONE'
                
            elif os.access(f'/data/{hub_id.strip()}_validation_dataset', os.R_OK):                    
                dataset = load_dataset(dataset_name.strip())
                train_size = len(dataset['train'])
                third_size = train_size // 3
                del dataset['test']
                del dataset['validation']                    
                print("FOUND VALIDATION")
                saved_dataset = load_from_disk(f'/data/{hub_id.strip()}_train_dataset2')     
                third_third = dataset['train'].select(range(third_size*2, train_size))
                dataset['train'] = third_third
                #tokenized_second_half = tokenize_function(third_third)
                tokenized_second_half = dataset.map(tokenize_function, batched=True)
                dataset['train'] = concatenate_datasets([saved_dataset, tokenized_second_half['train']])
                dataset['train'].save_to_disk(f'/data/{hub_id.strip()}_train_dataset3')
                return 'THIRD THIRD LOADED'
            
                                           
            if os.access(f'/data/{hub_id.strip()}_train_dataset', os.R_OK) and not os.access(f'/data/{hub_id.strip()}_train_dataset3', os.R_OK):
                dataset = load_dataset(dataset_name.strip())           
                train_size = len(dataset['train'])
                third_size = train_size // 3                
                second_third = dataset['train'].select(range(third_size, third_size*2))
                dataset['train'] = second_third
                del dataset['test']
                tokenized_sh_fq_dataset = dataset.map(tokenize_function, batched=True,)
                dataset['validation'] = dataset['validation'].map(tokenize_function, batched=True)
                saved_dataset = load_from_disk(f'/data/{hub_id.strip()}_train_dataset') 
                dataset['train'] = concatenate_datasets([saved_dataset, tokenized_sh_fq_dataset['train']])
                dataset['train'].save_to_disk(f'/data/{hub_id.strip()}_train_dataset2')
                dataset['validation'].save_to_disk(f'/data/{hub_id.strip()}_validation_dataset')
                return 'SECOND THIRD LOADED'
                
        except Exception as e:
            print(f"An error occurred: {str(e)}, TB: {traceback.format_exc()}")
            dataset = load_dataset(dataset_name.strip())
            train_size = len(dataset['train'])
            third_size = train_size // 3            
            # Tokenize the dataset                    
            first_third = dataset['train'].select(range(third_size))
            dataset['train'] = first_third
            del dataset['test']
            del dataset['validation']
            tokenized_first_third = dataset.map(tokenize_function, batched=True,)
            
            tokenized_first_third['train'].save_to_disk(f'/data/{hub_id.strip()}_train_dataset')                           
            print('DONE')
            return 'RUN AGAIN TO LOAD REST OF DATA'
        dataset = load_dataset(dataset_name.strip())
                
        #dataset['train'] = dataset['train'].select(range(4000))
        #dataset['validation'] = dataset['validation'].select(range(200))
        #train_set = dataset.map(tokenize_function, batched=True)
        

        #print(train_set.keys())

        
        #data_collator = DataCollatorForSeq2Seq(tokenizer, model=model)
        #trainer = Trainer(
            #model=model,
            #args=training_args,
            #train_dataset=train_set['train'], 
            #eval_dataset=train_set['validation'], 
            ##compute_metrics=compute_metrics,
            ##data_collator=data_collator,
            ##processing_class=tokenizer,
        #)
        print(f'ROOTDIR: {os.listdir("/data/results")}')
        for entry in os.listdir('/data/results'):
            try:
                current_dir = os.listdir(entry)
                print(f'{entry}: {current_dir}')
            except:
                pass
        
        def get_checkpoint_int(s):
            int_index = s.find('-')
            return int(s[int_index+1:])
            
        try:
            train_result = trainer.train(resume_from_checkpoint=True)
        except:
            checkpoint_dir = training_args.output_dir
            # If the trainer_state.json is missing, look for the previous checkpoint
            previous_checkpoints = sorted(os.listdir("/data/results"), key=get_checkpoint_int, reverse=True)

            for check in previous_checkpoints:
                try:
                    os.remove(os.path.join('/data/results', check))
                    print(f"Loading previous checkpoint")
                    train_result = trainer.train(resume_from_checkpoint=True)
                    trainer.push_to_hub(commit_message="Training complete!")
                    return 'DONE!'#train_result
                except:
                    pass

            print("No previous checkpoints found. Starting training from scratch.")
            train_result = 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!'#train_result


@spaces.GPU(duration=120)
def run_train(dataset_name, hub_id, api_key, num_epochs, batch_size, lr, grad):
    def initialize_weights(model):
        for name, param in model.named_parameters():
            if 'encoder.block.0.layer.0.DenseReluDense.wi.weight' in name:  # Example layer
                torch.nn.init.xavier_uniform_(param.data)  # Xavier initialization
            elif 'encoder.block.0.layer.0.DenseReluDense.wo.weight' in name:  # Another example layer
                torch.nn.init.kaiming_normal_(param.data)  # Kaiming initialization
    
    config = AutoConfig.from_pretrained("shorecode/t5-efficient-tiny-nh8-summarizer")
    model = AutoModelForSeq2SeqLM.from_config(config)
    initialize_weights(model)
    lora_config = LoraConfig(
        r=16,  # Rank of the low-rank adaptation
        lora_alpha=32,  # Scaling factor
        lora_dropout=0.1,  # Dropout for LoRA layers
        bias="none"  # Bias handling
    )
    #model = get_peft_model(model, lora_config)
    result = fine_tune_model(model, dataset_name, hub_id, api_key, num_epochs, batch_size, lr, grad)    
    return result
# Create Gradio interface
try:
    iface = gr.Interface(
        fn=run_train,
        inputs=[
            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."
    )

    # Launch the interface
    iface.launch()    
except Exception as e:
    print(f"An error occurred: {str(e)}, TB: {traceback.format_exc()}")