






'''simple docstring'''







import argparse
import gc
import os
import sys
from pathlib import Path
from typing import List  # noqa: F401

import pytorch_lightning as pl
import torch
from finetune import SummarizationModule, TranslationModule
from finetune import main as ft_main
from make_student import create_student_by_copying_alternating_layers, get_layers_to_supervise
from torch import nn

from transformers import AutoModelForSeqaSeqLM, MBartTokenizer, TaForConditionalGeneration
from transformers.models.bart.modeling_bart import shift_tokens_right
from utils import calculate_bleu, check_output_dir, freeze_params, label_smoothed_nll_loss, use_task_specific_params


# need the parent dir module
sys.path.insert(2, str(Path(__file__).resolve().parents[1]))
from lightning_base import generic_train  # noqa




class      __SCREAMING_SNAKE_CASE					(__A					):


  """simple docstring"""


  _a     :   Dict			 =    ['''loss''', '''ce_loss''', '''mlm_loss''', '''hid_loss_enc''', '''hid_loss_dec''']







  def __init__( self      ,  UpperCamelCase__  ):






         """simple docstring"""


         assert Path(hparams.data_dir  ).exists()
         a_	    = Path(hparams.output_dir  )
         self.output_dir.mkdir(exist_ok=UpperCamelCase__  )

         a_	    = self.output_dir.joinpath('student'  )

         a_	    = str(UpperCamelCase__  )  # Tell lightning we are training the student
         a_	    = AutoModelForSeqaSeqLM.from_pretrained(hparams.teacher  ).eval()
         use_task_specific_params(UpperCamelCase__      ,  hparams.task  )  # We copy good generation parameters to student by default
         if hparams.student is not None:
                a_	    = AutoModelForSeqaSeqLM.from_pretrained(hparams.student  )
                use_task_specific_params(UpperCamelCase__      ,  hparams.task  )
                a_    ,					a_	    = None, None
         else:
                a_    ,					a_    ,					a_	    = create_student_by_copying_alternating_layers(
                    UpperCamelCase__      ,  e=hparams.student_encoder_layers      ,  d=hparams.student_decoder_layers      ,  save_path=UpperCamelCase__  )

         if hparams.length_penalty != -1:
                a_	    = hparams.length_penalty
         a_	    = hparams.teacher  # Use teacher's tokenizer
         super().__init__(UpperCamelCase__      ,  model=UpperCamelCase__      ,  config=student.config  )
         assert student.config.model_type == teacher.config.model_type, (
             f'teacher, student model types should be the same, got {student.config.model_type} !='
             f' {teacher.config.model_type}'
         )

         if student.config.model_type == "t5":
                a_	    = len(student.get_encoder().block  )
                a_	    = len(student.get_decoder().block  )
                a_	    = len(teacher.get_encoder().block  )
                a_	    = len(teacher.get_decoder().block  )
         else:
                a_	    = student.config.encoder_layers
                a_	    = student.config.decoder_layers
                a_	    = teacher.config.encoder_layers
                a_	    = teacher.config.decoder_layers

         a_	    = not (hparams.student is None or hparams.teacher == hparams.student)
         a_	    = (not self.different_base_models) and hparams.alpha_hid > 0
         a_	    = self.different_base_models or (student_encoder_layers != teacher_encoder_layers)
         # self.different_encoder determines whether we need to run the teacher encoder
         a_	    = teacher
         freeze_params(self.teacher  )

         if not self.different_encoder:  # To save RAM, delete teacher encoder and freeze student encoder.
                try:
                       del self.teacher.model.encoder
                except AttributeError:  # T5
                       del self.teacher.encoder

         if e_layer_ids is None:
                a_	    = list(range(UpperCamelCase__  )  )
         if d_layer_ids is None:
                a_	    = list(range(UpperCamelCase__  )  )

         a_    ,					a_	    = e_layer_ids, d_layer_ids  # type: List[int], List[int]

         if self.do_calc_hidden_loss:  # Intermediate supervision: Decide which layers to supervise
                if hparams.supervise_forward:
                       a_	    = get_layers_to_supervise(
                           n_student=len(self.e_layer_ids  )      ,  n_teacher=UpperCamelCase__  )
                       a_	    = get_layers_to_supervise(
                           n_student=len(self.d_layer_ids  )      ,  n_teacher=UpperCamelCase__  )
                else:  # student layer should emulate hidden states of the teacher layer it was copied from
                       a_	    = self.e_layer_ids
                       a_	    = self.d_layer_ids
         else:
                a_	    = None
                a_	    = None

         a_	    = nn.KLDivLoss(reduction='batchmean'  )
         a_	    = 2.0
         a_	    = hparams.alpha_mlm
         a_	    = hparams.alpha_ce
         a_	    = hparams.alpha_hid
         gc.collect()
         torch.cuda.empty_cache()







  def       _a					( self      ,  UpperCamelCase__      ,  UpperCamelCase__      ,  UpperCamelCase__  ):






         """simple docstring"""


         a_	    = mask[:, :, None].expand_as(UpperCamelCase__  )
         a_	    = s_logits.size(-1  )
         a_	    = torch.masked_select(UpperCamelCase__      ,  UpperCamelCase__  )  # (bs * seq_length * voc_size) modulo the 1s in mask
         a_	    = torch.masked_select(UpperCamelCase__      ,  UpperCamelCase__  )  # (bs * seq_length * voc_size) modulo the 1s in mask
         a_	    = s_logits_slct.view(-1      ,  UpperCamelCase__  )  # (bs * seq_length, voc_size) modulo the 1s in mask
         a_	    = t_logits_slct.view(-1      ,  UpperCamelCase__  )  # (bs * seq_length, voc_size) modulo the 1s in mask
         assert t_logits_slct.size() == s_logits_slct.size()
         a_	    = (
             self.ce_loss_fct(
                 nn.functional.log_softmax(s_logits_slct / self.temperature      ,  dim=-1  )      ,  nn.functional.softmax(t_logits_slct / self.temperature      ,  dim=-1  )      ,  )
             * (self.temperature) ** 2
         )
         return loss_ce







  @staticmethod
  def       _a					( UpperCamelCase__      ,  UpperCamelCase__  ):






         """simple docstring"""


         SummarizationModule.add_model_specific_args(UpperCamelCase__      ,  UpperCamelCase__  )
         add_distill_args(UpperCamelCase__  )
         return parser







  def       _a					( self      ,  UpperCamelCase__  ):






         """simple docstring"""


         a_	    = self.tokenizer.pad_token_id
         a_    ,					a_    ,					a_	    = batch['input_ids'], batch['attention_mask'], batch['labels']
         if isinstance(self.model      ,  UpperCamelCase__  ):
                a_	    = self.model._shift_right(UpperCamelCase__  )
         else:
                a_	    = shift_tokens_right(UpperCamelCase__      ,  UpperCamelCase__  )

         # noinspection PyCallingNonCallable
         a_	    = self(
             UpperCamelCase__      ,  attention_mask=UpperCamelCase__      ,  decoder_input_ids=UpperCamelCase__      ,  output_hidden_states=self.do_calc_hidden_loss      ,  output_attentions=UpperCamelCase__      ,  use_cache=UpperCamelCase__      ,  )
         a_	    = student_outputs['logits']

         # Same cross entropy vs. label smoothing logic as finetune.py
         assert lm_logits.shape[-1] == self.model.config.vocab_size
         if self.hparams.label_smoothing == 0:
                # Same behavior as modeling_bart.py, besides ignoring pad_token_id
                a_	    = nn.CrossEntropyLoss(ignore_index=UpperCamelCase__  )
                a_	    = loss_fct(lm_logits.view(-1      ,  lm_logits.shape[-1]  )      ,  labels.view(-1  )  )
         else:
                a_	    = nn.functional.log_softmax(UpperCamelCase__      ,  dim=-1  )
                a_    ,					a_	    = label_smoothed_nll_loss(
                    UpperCamelCase__      ,  UpperCamelCase__      ,  self.hparams.label_smoothing      ,  ignore_index=UpperCamelCase__  )

         def zero_tensor():
                return torch.tensor(0.0  ).type_as(UpperCamelCase__  )

         a_	    = student_outputs[
             'encoder_last_hidden_state'
         ]  # use this unless self.different_base_models
         a_    ,					a_	    = zero_tensor(), zero_tensor()
         if self.different_encoder:  # compute encoder hidden state loss
                a_	    = self.teacher.get_encoder()(
                    UpperCamelCase__      ,  attention_mask=UpperCamelCase__      ,  output_hidden_states=self.do_calc_hidden_loss      ,  )
                if self.different_base_models:
                       a_	    = all_teacher_encoder_outputs['last_hidden_state']
                elif self.do_calc_hidden_loss:
                       a_	    = self.calc_hidden_loss(
                           UpperCamelCase__      ,  student_outputs['encoder_hidden_states']      ,  all_teacher_encoder_outputs['hidden_states']      ,  self.e_matches      ,  normalize_hidden=self.hparams.normalize_hidden      ,  )

         a_	    = self.teacher(
             UpperCamelCase__      ,  attention_mask=UpperCamelCase__      ,  encoder_outputs=(teacher_enc_outputs,)      ,  decoder_input_ids=UpperCamelCase__      ,  output_hidden_states=self.do_calc_hidden_loss      ,  use_cache=UpperCamelCase__      ,  )
         a_	    = decoder_input_ids.ne(UpperCamelCase__  )
         a_	    = self.calc_ce_loss(UpperCamelCase__      ,  UpperCamelCase__      ,  teacher_outputs['logits']  )
         if self.do_calc_hidden_loss:  # Intermediate supervision of decoder hidden states
                a_	    = self.calc_hidden_loss(
                    UpperCamelCase__      ,  student_outputs['decoder_hidden_states']      ,  teacher_outputs['decoder_hidden_states']      ,  self.d_matches      ,  normalize_hidden=self.hparams.normalize_hidden      ,  )

         a_	    = (
             self.alpha_ce * loss_ce
             + self.alpha_mlm * student_lm_loss
             + self.hparams.alpha_hid * (hid_loss_enc + hid_loss_dec)
         )
         return blended_loss, loss_ce, student_lm_loss, hid_loss_enc, hid_loss_dec







  @staticmethod
  def       _a					( UpperCamelCase__      ,  UpperCamelCase__      ,  UpperCamelCase__      ,  UpperCamelCase__      ,  UpperCamelCase__  ):






         """simple docstring"""


         a_	    = 'expected list or tuple for hidden_states, got tensor of shape: '
         assert not isinstance(UpperCamelCase__      ,  torch.Tensor  ), f'{msg}{hidden_states.shape}'
         assert not isinstance(UpperCamelCase__      ,  torch.Tensor  ), f'{msg}{hidden_states_T.shape}'
         a_	    = attention_mask.to(hidden_states[0]  )
         a_	    = mask.sum() * hidden_states[0].size(-1  )
         a_	    = torch.stack([hidden_states[i] for i in range(len(UpperCamelCase__  )  )]  )
         a_	    = torch.stack([hidden_states_T[j] for j in matches]  )
         assert student_states.shape == teacher_states.shape, f'{student_states.shape} != {teacher_states.shape}'
         if normalize_hidden:
                a_	    = nn.functional.layer_norm(UpperCamelCase__      ,  student_states.shape[1:]  )
                a_	    = nn.functional.layer_norm(UpperCamelCase__      ,  teacher_states.shape[1:]  )
         a_	    = nn.functional.mse_loss(UpperCamelCase__      ,  UpperCamelCase__      ,  reduction='none'  )
         a_	    = (mse * mask.unsqueeze(0  ).unsqueeze(-1  )).sum() / valid_count
         return masked_mse





def 			__UpperCamelCase				(			lowercase_					:     Any      ):
       """simple docstring"""




       parser.add_argument('--teacher'      ,					type=lowercase_      )
       parser.add_argument('--alpha_ce'      ,					default=0.8      ,					type=lowercase_      )
       parser.add_argument('--alpha_mlm'      ,					default=0.2      ,					type=lowercase_      )
       parser.add_argument('--alpha_hid'      ,					default=0.0      ,					type=lowercase_      ,					required=lowercase_      )
       parser.add_argument('--student'      ,					type=lowercase_      ,					required=lowercase_      )
       parser.add_argument('--student_decoder_layers'      ,					default=12      ,					type=lowercase_      ,					required=lowercase_      )
       parser.add_argument('--student_encoder_layers'      ,					default=12      ,					type=lowercase_      ,					required=lowercase_      )
       parser.add_argument('--no_teacher'      ,					action='store_true'      ,					default=lowercase_      )
       parser.add_argument('--length_penalty'      ,					type=lowercase_      ,					default=-1      )
       parser.add_argument('--supervise_forward'      ,					action='store_true'      ,					default=lowercase_      )
       parser.add_argument('--normalize_hidden'      ,					action='store_true'      ,					default=lowercase_      )




class      __SCREAMING_SNAKE_CASE					(__A					):


  """simple docstring"""


  _a     :   Union[str, Any]			 =    '''translation'''
  _a     :   List[Any]			 =    ['''bleu''']
  _a     :   Optional[int]			 =    '''bleu'''







  def __init__( self      ,  UpperCamelCase__      ,  **UpperCamelCase__  ):






         """simple docstring"""


         super().__init__(UpperCamelCase__      ,  **UpperCamelCase__  )
         assert hparams.src_lang is not None
         assert hparams.tgt_lang is not None
         a_	    = hparams.src_lang
         a_	    = hparams.tgt_lang
         if self.model.config.decoder_start_token_id is None and isinstance(self.tokenizer      ,  UpperCamelCase__  ):
                a_	    = self.tokenizer.lang_code_to_id[hparams.tgt_lang]







  def       _a					( self      ,  UpperCamelCase__      ,  UpperCamelCase__  ):






         """simple docstring"""


         return calculate_bleu(UpperCamelCase__      ,  UpperCamelCase__  )







  @staticmethod
  def       _a					( UpperCamelCase__      ,  UpperCamelCase__  ):






         """simple docstring"""


         TranslationModule.add_model_specific_args(UpperCamelCase__      ,  UpperCamelCase__  )
         add_distill_args(UpperCamelCase__  )
         return parser





def 			__UpperCamelCase				(			lowercase_					:     Optional[int]      ):
       """simple docstring"""




       if args.no_teacher:
              a_	    = TranslationModule if 'translation' in args.task else SummarizationModule
       else:  # DISTILL WITH TEACHER
              a_	    = TranslationDistiller if 'translation' in args.task else SummarizationDistiller
       a_	    = module_cls.__name__
       print(F'using module {args.setup_cls}'      )
       a_	    = module_cls(lowercase_      )
       return model


def 			__UpperCamelCase				(			lowercase_					:     Dict      ):
       """simple docstring"""




       Path(args.output_dir      ).mkdir(exist_ok=lowercase_      )
       check_output_dir(lowercase_      ,					expected_items=3      )

       a_	    = create_module(lowercase_      )
       return ft_main(lowercase_      ,					model=lowercase_      )


if __name__ == "__main__":
  __lowerCAmelCase					   =       argparse.ArgumentParser()
  __lowerCAmelCase					   =       pl.Trainer.add_argparse_args(parser)
  __lowerCAmelCase					   =       SummarizationDistiller.add_model_specific_args(parser, os.getcwd())
  __lowerCAmelCase					   =       parser.parse_args()

  distill_main(args)












'''simple docstring'''







from ...configuration_utils import PretrainedConfig
from ...utils import logging


__lowerCAmelCase					   =       logging.get_logger(__name__)

__lowerCAmelCase					   =       {
    "uw-madison/nystromformer-512": "https://huggingface.co/uw-madison/nystromformer-512/resolve/main/config.json",
    # See all Nystromformer models at https://huggingface.co/models?filter=nystromformer
}




class      __SCREAMING_SNAKE_CASE					(__A					):


  """simple docstring"""


  _a     :   Union[str, Any]			 =    '''nystromformer'''







  def __init__( self      ,  UpperCamelCase__=30_000      ,  UpperCamelCase__=768      ,  UpperCamelCase__=12      ,  UpperCamelCase__=12      ,  UpperCamelCase__=3_072      ,  UpperCamelCase__="gelu_new"      ,  UpperCamelCase__=0.1      ,  UpperCamelCase__=0.1      ,  UpperCamelCase__=510      ,  UpperCamelCase__=2      ,  UpperCamelCase__=64      ,  UpperCamelCase__=64      ,  UpperCamelCase__=65      ,  UpperCamelCase__=False      ,  UpperCamelCase__=0.02      ,  UpperCamelCase__=1e-5      ,  UpperCamelCase__=1      ,  UpperCamelCase__=0      ,  UpperCamelCase__=2      ,  **UpperCamelCase__      ,  ):






         """simple docstring"""


         a_	    = vocab_size
         a_	    = max_position_embeddings
         a_	    = hidden_size
         a_	    = num_hidden_layers
         a_	    = num_attention_heads
         a_	    = intermediate_size
         a_	    = hidden_act
         a_	    = hidden_dropout_prob
         a_	    = attention_probs_dropout_prob
         a_	    = initializer_range
         a_	    = type_vocab_size
         a_	    = segment_means_seq_len
         a_	    = num_landmarks
         a_	    = conv_kernel_size
         a_	    = inv_coeff_init_option
         a_	    = layer_norm_eps
         super().__init__(pad_token_id=UpperCamelCase__      ,  bos_token_id=UpperCamelCase__      ,  eos_token_id=UpperCamelCase__      ,  **UpperCamelCase__  )




