<jupyter_start><jupyter_code>import argparse
import os

import torch
from torch.optim import AdamW
from torch.utils.data import DataLoader
from peft import (
    get_peft_config,
    get_peft_model,
    get_peft_model_state_dict,
    set_peft_model_state_dict,
    LoraConfig,
    PeftType,
    PrefixTuningConfig,
    PromptEncoderConfig,
)

import evaluate
from datasets import load_dataset
from transformers import AutoModelForSequenceClassification, AutoTokenizer, get_linear_schedule_with_warmup, set_seed
from tqdm import tqdm
batch_size = 32
model_name_or_path = "roberta-large"
task = "mrpc"
peft_type = PeftType.LORA
device = "cuda"
num_epochs = 20
peft_config = LoraConfig(task_type="SEQ_CLS", inference_mode=False, r=8, lora_alpha=16, lora_dropout=0.1)
lr = 3e-4
if any(k in model_name_or_path for k in ("gpt", "opt", "bloom")):
    padding_side = "left"
else:
    padding_side = "right"

tokenizer = AutoTokenizer.from_pretrained(model_name_or_path, padding_side=padding_side)
if getattr(tokenizer, "pad_token_id") is None:
    tokenizer.pad_token_id = tokenizer.eos_token_id

datasets = load_dataset("glue", task)
metric = evaluate.load("glue", task)


def tokenize_function(examples):
    # max_length=None => use the model max length (it's actually the default)
    outputs = tokenizer(examples["sentence1"], examples["sentence2"], truncation=True, max_length=None)
    return outputs


tokenized_datasets = datasets.map(
    tokenize_function,
    batched=True,
    remove_columns=["idx", "sentence1", "sentence2"],
)

# We also rename the 'label' column to 'labels' which is the expected name for labels by the models of the
# transformers library
tokenized_datasets = tokenized_datasets.rename_column("label", "labels")


def collate_fn(examples):
    return tokenizer.pad(examples, padding="longest", return_tensors="pt")


# Instantiate dataloaders.
train_dataloader = DataLoader(tokenized_datasets["train"], shuffle=True, collate_fn=collate_fn, batch_size=batch_size)
eval_dataloader = DataLoader(
    tokenized_datasets["validation"], shuffle=False, collate_fn=collate_fn, batch_size=batch_size
)
model = AutoModelForSequenceClassification.from_pretrained(model_name_or_path, return_dict=True)
model = get_peft_model(model, peft_config)
model.print_trainable_parameters()
model
optimizer = AdamW(params=model.parameters(), lr=lr)

# Instantiate scheduler
lr_scheduler = get_linear_schedule_with_warmup(
    optimizer=optimizer,
    num_warmup_steps=0.06 * (len(train_dataloader) * num_epochs),
    num_training_steps=(len(train_dataloader) * num_epochs),
)
model.to(device)
for epoch in range(num_epochs):
    model.train()
    for step, batch in enumerate(tqdm(train_dataloader)):
        batch.to(device)
        outputs = model(**batch)
        loss = outputs.loss
        loss.backward()
        optimizer.step()
        lr_scheduler.step()
        optimizer.zero_grad()

    model.eval()
    for step, batch in enumerate(tqdm(eval_dataloader)):
        batch.to(device)
        with torch.no_grad():
            outputs = model(**batch)
        predictions = outputs.logits.argmax(dim=-1)
        predictions, references = predictions, batch["labels"]
        metric.add_batch(
            predictions=predictions,
            references=references,
        )

    eval_metric = metric.compute()
    print(f"epoch {epoch}:", eval_metric)<jupyter_output>0%|                                                                                                  | 0/115 [00:00<?, ?it/s]You're using a RobertaTokenizerFast tokenizer. Please note that with a fast tokenizer, using the `__call__` method is faster than using a method to encode the text followed by a call to the `pad` method to get a padded encoding.
100%|████████████████████████████████████████████████████████████████████████████████████████| 115/115 [00:28<00:00,  4.08it/s]
100%|██████████████████████████████████████████████████████████████████████████████████████████| 13/13 [00:01<00:00,  8.68it/s]<jupyter_text>Share adapters on the 🤗 Hub<jupyter_code>model.push_to_hub("smangrul/roberta-large-peft-lora", use_auth_token=True)<jupyter_output><empty_output><jupyter_text>Load adapters from the HubYou can also directly load adapters from the Hub using the commands below:<jupyter_code>import torch
from peft import PeftModel, PeftConfig
from transformers import AutoModelForCausalLM, AutoTokenizer

peft_model_id = "smangrul/roberta-large-peft-lora"
config = PeftConfig.from_pretrained(peft_model_id)
inference_model = AutoModelForSequenceClassification.from_pretrained(config.base_model_name_or_path)
tokenizer = AutoTokenizer.from_pretrained(config.base_model_name_or_path)

# Load the Lora model
inference_model = PeftModel.from_pretrained(inference_model, peft_model_id)

inference_model.to(device)
inference_model.eval()
for step, batch in enumerate(tqdm(eval_dataloader)):
    batch.to(device)
    with torch.no_grad():
        outputs = inference_model(**batch)
    predictions = outputs.logits.argmax(dim=-1)
    predictions, references = predictions, batch["labels"]
    metric.add_batch(
        predictions=predictions,
        references=references,
    )

eval_metric = metric.compute()
print(eval_metric)<jupyter_output>Some weights of the model checkpoint at roberta-large were not used when initializing RobertaForSequenceClassification: ['lm_head.bias', 'roberta.pooler.dense.weight', 'roberta.pooler.dense.bias', 'lm_head.layer_norm.weight', 'lm_head.decoder.weight', 'lm_head.dense.bias', 'lm_head.dense.weight', 'lm_head.layer_norm.bias']
- This IS expected if you are initializing RobertaForSequenceClassification from the checkpoint of a model trained on another task or with another architecture (e.g. initializing a BertForSequenceClassification model from a BertForPreTraining model).
- This IS NOT expected if you are initializing RobertaForSequenceClassification from the checkpoint of a model that you expect to be exactly identical (initializing a BertForSequenceClassification model from a BertForSequenceClassification model).
Some weights of RobertaForSequenceClassification were not initialized from the model checkpoint at roberta-large and are newly initialized: ['classifier.dense.bias', 'classifie[...]