






'''simple docstring'''
import logging
import os
import sys
from dataclasses import dataclass, field
from typing import List, Optional

import torch
from datasets import Dataset
from torch import nn
from tqdm.auto import tqdm

from transformers import (
    AutoModelForSequenceClassification,
    AutoTokenizer,
    HfArgumentParser,
    Trainer,
    TrainingArguments,
    set_seed,
    utils,
)
from transformers.trainer_utils import get_last_checkpoint, is_main_process


__lowerCAmelCase							="\nDistills an NLI-based zero-shot classifier to a smaller, more efficient model with a fixed set of candidate class\nnames. Useful for speeding up zero-shot classification in cases where labeled training data is not available, but\nwhen only a single fixed set of classes is needed. Takes a teacher NLI model, student classifier model, unlabeled\ndataset, and set of K possible class names. Yields a single classifier with K outputs corresponding to the provided\nclass names.\n"

__lowerCAmelCase							=logging.getLogger(__name__)


@dataclass
class    _snake_case   :

					"""simple docstring"""





					_UpperCamelCase		 =      field(
					    default="roberta-large-mnli"     ,					metadata={"help": "The NLI/zero-shot teacher model to be distilled."}					)
					_UpperCamelCase		 =      field(
					    default="This example is {}."     ,					metadata={
					        "help": (
					            "Template used to turn class names into mock hypotheses for teacher NLI model. Must include {{}}"
					            "where class name is inserted."
					        )
					    }     ,					)
					_UpperCamelCase		 =      field(
					    default=32     ,					metadata={"help": "Batch size for generating teacher predictions."}					)
					_UpperCamelCase		 =      field(
					    default=_SCREAMING_SNAKE_CASE     ,					metadata={
					        "help": (
					            "Allow multiple classes to be true rather than forcing them to sum to 1 (sometimes called"
					            "multi-class multi-label classification)."
					        )
					    }     ,					)
					_UpperCamelCase		 =      field(
					    default=1.0     ,					metadata={"help": "Temperature applied to teacher softmax for distillation."}					)



@dataclass
class    _snake_case   :

					"""simple docstring"""





					_UpperCamelCase		 =      field(
					    default="distilbert-base-uncased"     ,					metadata={"help": "The NLI/zero-shot teacher model to be distilled."}					)



@dataclass
class    _snake_case   :

					"""simple docstring"""





					_UpperCamelCase		 =      field(metadata={"help": "Text file with one unlabeled instance per line."}					)
					_UpperCamelCase		 =      field(metadata={"help": "Text file with one class name per line."}					)
					_UpperCamelCase		 =      field(
					    default=_SCREAMING_SNAKE_CASE     ,					metadata={"help": "Whether to use one of the fast tokenizer (backed by the Rust tokenizers library) or not."}     ,					)



@dataclass
class    _snake_case   (				_SCREAMING_SNAKE_CASE					):

					"""simple docstring"""





					_UpperCamelCase		 =      field(
					    default=_SCREAMING_SNAKE_CASE     ,					metadata={"help": "The output directory where the model predictions and checkpoints will be written."}     ,					)
					_UpperCamelCase		 =      field(
					    default=32     ,					metadata={"help": "Batch size per GPU/TPU core/CPU for training."}					)
					_UpperCamelCase		 =      field(
					    default=128     ,					metadata={"help": "Batch size per GPU/TPU core/CPU for evaluation."}					)
					_UpperCamelCase		 =      field(default=1.0     ,					metadata={"help": "Total number of training epochs to perform."}					)
					_UpperCamelCase		 =      field(default=_SCREAMING_SNAKE_CASE     ,					metadata={"help": "Whether to run training of student model."}					)
					_UpperCamelCase		 =      field(
					    default=_SCREAMING_SNAKE_CASE     ,					metadata={
					        "help": (
					            "Whether to evaluate the agreement of the final student predictions and the teacher predictions"
					            "after training."
					        )
					    }     ,					)
					_UpperCamelCase		 =      field(
					    default=0     ,					metadata={
					        "help": (
					            "Limit the total amount of checkpoints."
					            "Deletes the older checkpoints in the output_dir. Default is 0 (no checkpoints)."
					        )
					    }     ,					)



class    _snake_case   (				_SCREAMING_SNAKE_CASE					):

					"""simple docstring"""





					def  __SCREAMING_SNAKE_CASE (     self   , UpperCAmelCase__   , UpperCAmelCase__   , UpperCAmelCase__=False     )      ->	Any:
										a_									=   inputs['labels']
										a_									=   model(inputs['input_ids']   , attention_mask=inputs['attention_mask']     )
										a_									=   outputs[0]

										a_									=   -torch.sum(target_p * logits.log_softmax(dim=-1     )   , axis=-1     ).mean()

										if return_outputs:
															return loss, outputs

										return loss



def 							a	(   _UpperCAmelCase ):






					"""simple docstring"""







					a_									=   []
					with open(_UpperCAmelCase					,  'r' ) as f:
										for line in f:
															a_									=   line.strip()
															if len(_UpperCAmelCase ) > 0:
																				lines.append(_UpperCAmelCase )
					return lines

def 							a	(   _UpperCAmelCase					,  _UpperCAmelCase					,  _UpperCAmelCase ):






					"""simple docstring"""







					a_									=   []
					a_									=   []
					for example in examples:
										for name in class_names:
															premises.append(_UpperCAmelCase )
															hypotheses.append(hypothesis_template.format(_UpperCAmelCase ) )
					return premises, hypotheses

def 							a	(   _UpperCAmelCase ):






					"""simple docstring"""







					for label, ind in config.labelaid.items():
										if label.lower().startswith('entail' ):
															return ind
					logger.warning('Could not identify entailment dimension from teacher config label2id. Setting to -1.' )
					return -1

def 							a	(   _UpperCAmelCase					,  _UpperCAmelCase					,  _UpperCAmelCase					,  _UpperCAmelCase					,  _UpperCAmelCase					,  _UpperCAmelCase					,  _UpperCAmelCase					,  _UpperCAmelCase					,  _UpperCAmelCase					,  _UpperCAmelCase					,  ):






					"""simple docstring"""







					a_									=   AutoModelForSequenceClassification.from_pretrained(_UpperCAmelCase )
					a_									=   model.config
					if not no_cuda and torch.cuda.is_available():
										a_									=   nn.DataParallel(model.cuda() )
										batch_size *= len(model.device_ids )
					a_									=   AutoTokenizer.from_pretrained(_UpperCAmelCase					,  use_fast=_UpperCAmelCase )

					a_							,					a_									=   get_premise_hypothesis_pairs(_UpperCAmelCase					,  _UpperCAmelCase					,  _UpperCAmelCase )
					a_									=   []

					for i in tqdm(range(0					,  len(_UpperCAmelCase )					,  _UpperCAmelCase ) ):
										a_									=   premises[i : i + batch_size]
										a_									=   hypotheses[i : i + batch_size]

										a_									=   tokenizer(
										    _UpperCAmelCase					,  _UpperCAmelCase					,  padding=_UpperCAmelCase					,  truncation='only_first'					,  return_tensors='pt'					,  )

										with torch.cuda.amp.autocast(enabled=_UpperCAmelCase ):
															with torch.no_grad():
																				a_									=   model(**_UpperCAmelCase )
										logits.append(outputs.logits.detach().cpu().float() )

					a_									=   get_entailment_id(_UpperCAmelCase )
					a_									=   -1 if entail_id == 0 else 0
					a_									=   torch.cat(_UpperCAmelCase					,  dim=0 )  # N*K x 3
					a_									=   logits.reshape(len(_UpperCAmelCase )					,  len(_UpperCAmelCase )					,  -1 )[..., [contr_id, entail_id]]  # N x K x 2

					if multi_label:
										# softmax over (contr, entail) logits for each class independently
										a_									=   (nli_logits / temperature).softmax(-1 )
					else:
										# softmax over entail logits across classes s.t. class probabilities sum to 1.
										a_									=   (nli_logits / temperature).softmax(1 )

					return nli_prob[..., 1]  # N x K

def 							a	(   ):






					"""simple docstring"""







					a_									=   HfArgumentParser(
					    (DataTrainingArguments, TeacherModelArguments, StudentModelArguments, DistillTrainingArguments)					,  description=_UpperCAmelCase					,  )

					if len(sys.argv ) == 2 and sys.argv[1].endswith('.json' ):
										# If we pass only one argument to the script and it's the path to a json file,
										# let's parse it to get our arguments.
										a_							,					a_							,					a_							,					a_									=   parser.parse_json_file(
										    json_file=os.path.abspath(sys.argv[1] ) )
					else:
										a_							,					a_							,					a_							,					a_									=   parser.parse_args_into_dataclasses()

					# Detecting last checkpoint.
					a_									=   None
					if os.path.isdir(training_args.output_dir ) and training_args.do_train and not training_args.overwrite_output_dir:
										a_									=   get_last_checkpoint(training_args.output_dir )
										if last_checkpoint is None and len(os.listdir(training_args.output_dir ) ) > 0:
															raise ValueError(
															    F'''Output directory ({training_args.output_dir}) already exists and is not empty. '''
															    'Use --overwrite_output_dir to overcome.' )
										elif last_checkpoint is not None:
															logger.info(
															    F'''Checkpoint detected, resuming training at {last_checkpoint}. To avoid this behavior, change '''
															    'the `--output_dir` or add `--overwrite_output_dir` to train from scratch.' )

    # Setup logging
					logging.basicConfig(
					    format='%(asctime)s - %(levelname)s - %(name)s - %(message)s'					,  datefmt='%m/%d/%Y %H:%M:%S'					,  handlers=[logging.StreamHandler(sys.stdout )]					,  )
					logger.setLevel(logging.INFO if is_main_process(training_args.local_rank ) else logging.WARN )

					# Log on each process the small summary:
					logger.warning(
					    F'''Process rank: {training_args.local_rank}, device: {training_args.device}, n_gpu: {training_args.n_gpu}'''
					    + F'''distributed training: {bool(training_args.local_rank != -1 )}, 16-bits training: {training_args.fpaa}''' )
					# Set the verbosity to info of the Transformers logger (on main process only):
					if is_main_process(training_args.local_rank ):
										utils.logging.set_verbosity_info()
										utils.logging.enable_default_handler()
										utils.logging.enable_explicit_format()

					if training_args.local_rank != -1:
										raise ValueError('Distributed training is not currently supported.' )
					if training_args.tpu_num_cores is not None:
										raise ValueError('TPU acceleration is not currently supported.' )

					logger.info(F'''Training/evaluation parameters {training_args}''' )

					# Set seed before initializing model.
					set_seed(training_args.seed )

					# 1. read in data
					a_									=   read_lines(data_args.data_file )
					a_									=   read_lines(data_args.class_names_file )

					# 2. get teacher predictions and load into dataset
					logger.info('Generating predictions from zero-shot teacher model' )
					a_									=   get_teacher_predictions(
					    teacher_args.teacher_name_or_path					,  _UpperCAmelCase					,  _UpperCAmelCase					,  teacher_args.hypothesis_template					,  teacher_args.teacher_batch_size					,  teacher_args.temperature					,  teacher_args.multi_label					,  data_args.use_fast_tokenizer					,  training_args.no_cuda					,  training_args.fpaa					,  )
					a_									=   Dataset.from_dict(
					    {
					        'text': examples,
					        'labels': teacher_soft_preds,
					    } )

					# 3. create student
					logger.info('Initializing student model' )
					a_									=   AutoModelForSequenceClassification.from_pretrained(
					    student_args.student_name_or_path					,  num_labels=len(_UpperCAmelCase ) )
					a_									=   AutoTokenizer.from_pretrained(student_args.student_name_or_path					,  use_fast=data_args.use_fast_tokenizer )
					a_									=   dict(enumerate(_UpperCAmelCase ) )
					a_									=   {label: i for i, label in enumerate(_UpperCAmelCase )}

					# 4. train student on teacher predictions
					a_									=   dataset.map(_UpperCAmelCase					,  input_columns='text' )
					dataset.set_format('torch' )

					def compute_metrics(_UpperCAmelCase					,  _UpperCAmelCase=False ):
										a_									=   p.predictions.argmax(-1 )
										a_									=   p.label_ids.argmax(-1 )  # "label_ids" are actually distributions
										return {"agreement": (preds == proxy_labels).mean().item()}

					a_									=   DistillationTrainer(
					    model=_UpperCAmelCase					,  tokenizer=_UpperCAmelCase					,  args=_UpperCAmelCase					,  train_dataset=_UpperCAmelCase					,  compute_metrics=_UpperCAmelCase					,  )

					if training_args.do_train:
										logger.info('Training student model on teacher predictions' )
										trainer.train()

					if training_args.do_eval:
										a_									=   trainer.evaluate(eval_dataset=_UpperCAmelCase )['eval_agreement']
										logger.info(F'''Agreement of student and teacher predictions: {agreement * 1_0_0:0.2f}%''' )

					trainer.save_model()


if __name__ == "__main__":
						main()









'''simple docstring'''
import os
import shutil
import unittest
from unittest.mock import patch

from transformers.testing_utils import CaptureStd, is_pt_tf_cross_test, require_torch


class    _snake_case   (				unittest.TestCase					):

					"""simple docstring"""





					@patch('sys.argv'   , ['fakeprogrampath', 'env']     )
					def  __SCREAMING_SNAKE_CASE (     self     )      ->	Tuple:
										# test transformers-cli env
										import transformers.commands.transformers_cli

										with CaptureStd() as cs:
															transformers.commands.transformers_cli.main()
										self.assertIn('Python version'   , cs.out     )
										self.assertIn('Platform'   , cs.out     )
										self.assertIn('Using distributed or parallel set-up in script?'   , cs.out     )




					@is_pt_tf_cross_test
					@patch(
					    'sys.argv'   , ['fakeprogrampath', 'pt-to-tf', '--model-name', 'hf-internal-testing/tiny-random-gptj', '--no-pr']     )
					def  __SCREAMING_SNAKE_CASE (     self     )      ->	List[str]:
										import transformers.commands.transformers_cli

										shutil.rmtree('/tmp/hf-internal-testing/tiny-random-gptj'   , ignore_errors=UpperCAmelCase__     )  # cleans potential past runs
										transformers.commands.transformers_cli.main()

										# The original repo has no TF weights -- if they exist, they were created by the CLI
										self.assertTrue(os.path.exists('/tmp/hf-internal-testing/tiny-random-gptj/tf_model.h5'     )     )




					@require_torch
					@patch('sys.argv'   , ['fakeprogrampath', 'download', 'hf-internal-testing/tiny-random-gptj', '--cache-dir', '/tmp']     )
					def  __SCREAMING_SNAKE_CASE (     self     )      ->	List[Any]:
										import transformers.commands.transformers_cli

										# # remove any previously downloaded model to start clean
										shutil.rmtree('/tmp/models--hf-internal-testing--tiny-random-gptj'   , ignore_errors=UpperCAmelCase__     )

										# run the command
										transformers.commands.transformers_cli.main()

										# check if the model files are downloaded correctly on /tmp/models--hf-internal-testing--tiny-random-gptj
										self.assertTrue(os.path.exists('/tmp/models--hf-internal-testing--tiny-random-gptj/blobs'     )     )
										self.assertTrue(os.path.exists('/tmp/models--hf-internal-testing--tiny-random-gptj/refs'     )     )
										self.assertTrue(os.path.exists('/tmp/models--hf-internal-testing--tiny-random-gptj/snapshots'     )     )




					@require_torch
					@patch(
					    'sys.argv'   , [
					        'fakeprogrampath',
					        'download',
					        'hf-internal-testing/test_dynamic_model_with_tokenizer',
					        '--trust-remote-code',
					        '--cache-dir',
					        '/tmp',
					    ]   , )
					def  __SCREAMING_SNAKE_CASE (     self     )      ->	int:
										import transformers.commands.transformers_cli

										# # remove any previously downloaded model to start clean
										shutil.rmtree('/tmp/models--hf-internal-testing--test_dynamic_model_with_tokenizer'   , ignore_errors=UpperCAmelCase__     )

										# run the command
										transformers.commands.transformers_cli.main()

										# check if the model files are downloaded correctly on /tmp/models--hf-internal-testing--test_dynamic_model_with_tokenizer
										self.assertTrue(os.path.exists('/tmp/models--hf-internal-testing--test_dynamic_model_with_tokenizer/blobs'     )     )
										self.assertTrue(os.path.exists('/tmp/models--hf-internal-testing--test_dynamic_model_with_tokenizer/refs'     )     )
										self.assertTrue(
										    os.path.exists('/tmp/models--hf-internal-testing--test_dynamic_model_with_tokenizer/snapshots'     )     )

