'''simple docstring'''

import argparse
import logging
import os
from pathlib import Path
from typing import Any, Dict

import pytorch_lightning as pl
from pytorch_lightning.utilities import rank_zero_info

from transformers import (
    AdamW,
    AutoConfig,
    AutoModel,
    AutoModelForPreTraining,
    AutoModelForQuestionAnswering,
    AutoModelForSeqaSeqLM,
    AutoModelForSequenceClassification,
    AutoModelForTokenClassification,
    AutoModelWithLMHead,
    AutoTokenizer,
    PretrainedConfig,
    PreTrainedTokenizer,
)
from transformers.optimization import (
    Adafactor,
    get_cosine_schedule_with_warmup,
    get_cosine_with_hard_restarts_schedule_with_warmup,
    get_linear_schedule_with_warmup,
    get_polynomial_decay_schedule_with_warmup,
)
from transformers.utils.versions import require_version


_lowerCamelCase :				str														= logging.getLogger(__name__)

require_version("""pytorch_lightning>=1.0.4""")

_lowerCamelCase :				Tuple														= {
    """base""": AutoModel,
    """sequence-classification""": AutoModelForSequenceClassification,
    """question-answering""": AutoModelForQuestionAnswering,
    """pretraining""": AutoModelForPreTraining,
    """token-classification""": AutoModelForTokenClassification,
    """language-modeling""": AutoModelWithLMHead,
    """summarization""": AutoModelForSeqaSeqLM,
    """translation""": AutoModelForSeqaSeqLM,
}


# update this and the import above to support new schedulers from transformers.optimization
_lowerCamelCase :				Dict														= {
    """linear""": get_linear_schedule_with_warmup,
    """cosine""": get_cosine_schedule_with_warmup,
    """cosine_w_restarts""": get_cosine_with_hard_restarts_schedule_with_warmup,
    """polynomial""": get_polynomial_decay_schedule_with_warmup,
    # '': get_constant_schedule,             # not supported for now
    # '': get_constant_schedule_with_warmup, # not supported for now
}
_lowerCamelCase :				Optional[Any]														= sorted(arg_to_scheduler.keys())
_lowerCamelCase :				str														= """{""" + """, """.join(arg_to_scheduler_choices) + """}"""




class    lowerCamelCase__  (   pl.LightningModule     ):



   def __init__(    self					,      lowerCAmelCase__					,      lowerCAmelCase__=None					,      lowerCAmelCase__="base"					,      lowerCAmelCase__=None					,      lowerCAmelCase__=None					,      lowerCAmelCase__=None					,      **lowerCAmelCase__					,      )				->     str:
        """simple docstring"""





        super().__init__()
        # TODO: move to self.save_hyperparameters()
        # self.save_hyperparameters()
        # can also expand arguments into trainer signature for easier reading

        self.save_hyperparameters(lowerCAmelCase__     )
        _UpperCamelCase  :Union[str, Any]       =0
        _UpperCamelCase  :Optional[int]       =Path(self.hparams.output_dir     )
        _UpperCamelCase  :Any       =self.hparams.cache_dir if self.hparams.cache_dir else None
        if config is None:
             _UpperCamelCase  :List[Any]       =AutoConfig.from_pretrained(
                 self.hparams.config_name if self.hparams.config_name else self.hparams.model_name_or_path					,      **({"""num_labels""": num_labels} if num_labels is not None else {})					,      cache_dir=lowerCAmelCase__					,      **lowerCAmelCase__					,      )
        else:
             _UpperCamelCase  :PretrainedConfig       =config

        _UpperCamelCase  :int       =("""encoder_layerdrop""", """decoder_layerdrop""", """dropout""", """attention_dropout""")
        for p in extra_model_params:
             if getattr(self.hparams					,      lowerCAmelCase__					,      lowerCAmelCase__     ):
                  assert hasattr(self.config					,      lowerCAmelCase__     ), f'''model config doesn\'t have a `{p}` attribute'''
                  setattr(self.config					,      lowerCAmelCase__					,      getattr(self.hparams					,      lowerCAmelCase__     )     )

        if tokenizer is None:
             _UpperCamelCase  :Optional[Any]       =AutoTokenizer.from_pretrained(
                 self.hparams.tokenizer_name if self.hparams.tokenizer_name else self.hparams.model_name_or_path					,      cache_dir=lowerCAmelCase__					,      )
        else:
             _UpperCamelCase  :PreTrainedTokenizer       =tokenizer
        _UpperCamelCase  :Union[str, Any]       =MODEL_MODES[mode]
        if model is None:
             _UpperCamelCase  :Optional[int]       =self.model_type.from_pretrained(
                 self.hparams.model_name_or_path					,      from_tf=bool(""".ckpt""" in self.hparams.model_name_or_path     )					,      config=self.config					,      cache_dir=lowerCAmelCase__					,      )
        else:
             _UpperCamelCase  :Optional[Any]       =model



   def  _UpperCamelCase		(    self					,      *lowerCAmelCase__					,      **lowerCAmelCase__     )				->     Union[str, Any]:
        """simple docstring"""





        _UpperCamelCase  :Union[str, Any]       =self.model_type.from_pretrained(*lowerCAmelCase__					,      **lowerCAmelCase__     )



   def  _UpperCamelCase		(    self     )				->     Optional[Any]:
        """simple docstring"""





        _UpperCamelCase  :int       =arg_to_scheduler[self.hparams.lr_scheduler]
        _UpperCamelCase  :int       =get_schedule_func(
            self.opt					,      num_warmup_steps=self.hparams.warmup_steps					,      num_training_steps=self.total_steps()     )
        _UpperCamelCase  :Union[str, Any]       ={"""scheduler""": scheduler, """interval""": """step""", """frequency""": 1}
        return scheduler



   def  _UpperCamelCase		(    self     )				->     Optional[int]:
        """simple docstring"""





        _UpperCamelCase  :int       =self.model
        _UpperCamelCase  :List[str]       =["""bias""", """LayerNorm.weight"""]
        _UpperCamelCase  :List[Any]       =[
            {
                """params""": [p for n, p in model.named_parameters() if not any(nd in n for nd in no_decay     )],
                """weight_decay""": self.hparams.weight_decay,
            },
            {
                """params""": [p for n, p in model.named_parameters() if any(nd in n for nd in no_decay     )],
                """weight_decay""": 0.0,
            },
        ]
        if self.hparams.adafactor:
             _UpperCamelCase  :Dict       =Adafactor(
                 lowerCAmelCase__					,      lr=self.hparams.learning_rate					,      scale_parameter=lowerCAmelCase__					,      relative_step=lowerCAmelCase__     )

        else:
             _UpperCamelCase  :List[str]       =AdamW(
                 lowerCAmelCase__					,      lr=self.hparams.learning_rate					,      eps=self.hparams.adam_epsilon     )
        _UpperCamelCase  :str       =optimizer

        _UpperCamelCase  :Tuple       =self.get_lr_scheduler()

        return [optimizer], [scheduler]



   def  _UpperCamelCase		(    self					,      lowerCAmelCase__					,      lowerCAmelCase__     )				->     Tuple:
        """simple docstring"""





        return self.validation_step(lowerCAmelCase__					,      lowerCAmelCase__     )



   def  _UpperCamelCase		(    self					,      lowerCAmelCase__     )				->     Tuple:
        """simple docstring"""





        return self.validation_end(lowerCAmelCase__     )



   def  _UpperCamelCase		(    self     )				->     int:
        """simple docstring"""





        _UpperCamelCase  :Union[str, Any]       =max(1					,      self.hparams.gpus     )  # TODO: consider num_tpu_cores
        _UpperCamelCase  :Union[str, Any]       =self.hparams.train_batch_size * self.hparams.accumulate_grad_batches * num_devices
        return (self.dataset_size / effective_batch_size) * self.hparams.max_epochs



   def  _UpperCamelCase		(    self					,      lowerCAmelCase__     )				->     List[Any]:
        """simple docstring"""





        if mode == "test":
             _UpperCamelCase  :Union[str, Any]       =len(self.test_dataloader().dataset     )
        else:
             _UpperCamelCase  :Optional[int]       =self.get_dataloader("""train"""					,      self.hparams.train_batch_size					,      shuffle=lowerCAmelCase__     )
             _UpperCamelCase  :List[str]       =len(self.train_dataloader().dataset     )



   def  _UpperCamelCase		(    self					,      lowerCAmelCase__					,      lowerCAmelCase__					,      lowerCAmelCase__ = False     )				->     List[str]:
        """simple docstring"""





        raise NotImplementedError("""You must implement this for your task"""     )



   def  _UpperCamelCase		(    self     )				->     Union[str, Any]:
        """simple docstring"""





        return self.train_loader



   def  _UpperCamelCase		(    self     )				->     Optional[int]:
        """simple docstring"""





        return self.get_dataloader("""dev"""					,      self.hparams.eval_batch_size					,      shuffle=lowerCAmelCase__     )



   def  _UpperCamelCase		(    self     )				->     Optional[Any]:
        """simple docstring"""





        return self.get_dataloader("""test"""					,      self.hparams.eval_batch_size					,      shuffle=lowerCAmelCase__     )



   def  _UpperCamelCase		(    self					,      lowerCAmelCase__     )				->     int:
        """simple docstring"""





        return os.path.join(
            self.hparams.data_dir					,      """cached_{}_{}_{}""".format(
                lowerCAmelCase__					,      list(filter(lowerCAmelCase__					,      self.hparams.model_name_or_path.split("""/"""     )     )     ).pop()					,      str(self.hparams.max_seq_length     )					,      )					,      )



   @pl.utilities.rank_zero_only
   def  _UpperCamelCase		(    self					,      lowerCAmelCase__     )				->     None:
        """simple docstring"""





        _UpperCamelCase  :Any       =self.output_dir.joinpath("""best_tfmr"""     )
        _UpperCamelCase  :Optional[Any]       =self.step_count
        self.model.save_pretrained(lowerCAmelCase__     )
        self.tokenizer.save_pretrained(lowerCAmelCase__     )




   @staticmethod
   def  _UpperCamelCase		(    lowerCAmelCase__					,      lowerCAmelCase__     )				->     str:
        """simple docstring"""





        parser.add_argument(
            """--model_name_or_path"""					,      default=lowerCAmelCase__					,      type=lowerCAmelCase__					,      required=lowerCAmelCase__					,      help="""Path to pretrained model or model identifier from huggingface.co/models"""					,      )
        parser.add_argument(
            """--config_name"""					,      default=""""""					,      type=lowerCAmelCase__					,      help="""Pretrained config name or path if not the same as model_name"""     )
        parser.add_argument(
            """--tokenizer_name"""					,      default=lowerCAmelCase__					,      type=lowerCAmelCase__					,      help="""Pretrained tokenizer name or path if not the same as model_name"""					,      )
        parser.add_argument(
            """--cache_dir"""					,      default=""""""					,      type=lowerCAmelCase__					,      help="""Where do you want to store the pre-trained models downloaded from huggingface.co"""					,      )
        parser.add_argument(
            """--encoder_layerdrop"""					,      type=lowerCAmelCase__					,      help="""Encoder layer dropout probability (Optional). Goes into model.config"""					,      )
        parser.add_argument(
            """--decoder_layerdrop"""					,      type=lowerCAmelCase__					,      help="""Decoder layer dropout probability (Optional). Goes into model.config"""					,      )
        parser.add_argument(
            """--dropout"""					,      type=lowerCAmelCase__					,      help="""Dropout probability (Optional). Goes into model.config"""					,      )
        parser.add_argument(
            """--attention_dropout"""					,      type=lowerCAmelCase__					,      help="""Attention dropout probability (Optional). Goes into model.config"""					,      )
        parser.add_argument("""--learning_rate"""					,      default=5e-5					,      type=lowerCAmelCase__					,      help="""The initial learning rate for Adam."""     )
        parser.add_argument(
            """--lr_scheduler"""					,      default="""linear"""					,      choices=lowerCAmelCase__					,      metavar=lowerCAmelCase__					,      type=lowerCAmelCase__					,      help="""Learning rate scheduler"""					,      )
        parser.add_argument("""--weight_decay"""					,      default=0.0					,      type=lowerCAmelCase__					,      help="""Weight decay if we apply some."""     )
        parser.add_argument("""--adam_epsilon"""					,      default=1e-8					,      type=lowerCAmelCase__					,      help="""Epsilon for Adam optimizer."""     )
        parser.add_argument("""--warmup_steps"""					,      default=0					,      type=lowerCAmelCase__					,      help="""Linear warmup over warmup_steps."""     )
        parser.add_argument("""--num_workers"""					,      default=4					,      type=lowerCAmelCase__					,      help="""kwarg passed to DataLoader"""     )
        parser.add_argument("""--num_train_epochs"""					,      dest="""max_epochs"""					,      default=3					,      type=lowerCAmelCase__     )
        parser.add_argument("""--train_batch_size"""					,      default=32					,      type=lowerCAmelCase__     )
        parser.add_argument("""--eval_batch_size"""					,      default=32					,      type=lowerCAmelCase__     )
        parser.add_argument("""--adafactor"""					,      action="""store_true"""     )




class    lowerCamelCase__  (   pl.Callback     ):



   def  _UpperCamelCase		(    self					,      lowerCAmelCase__					,      lowerCAmelCase__     )				->     Union[str, Any]:
        """simple docstring"""





        _UpperCamelCase  :Optional[int]       =trainer.lr_schedulers[0]["""scheduler"""]
        _UpperCamelCase  :Union[str, Any]       ={f'''lr_group_{i}''': lr for i, lr in enumerate(lr_scheduler.get_lr()     )}
        pl_module.logger.log_metrics(lowerCAmelCase__     )



   def  _UpperCamelCase		(    self					,      lowerCAmelCase__					,      lowerCAmelCase__     )				->     Optional[int]:
        """simple docstring"""





        rank_zero_info("""***** Validation results *****"""     )
        _UpperCamelCase  :Optional[Any]       =trainer.callback_metrics
        # Log results
        for key in sorted(lowerCAmelCase__     ):
             if key not in ["log", "progress_bar"]:
                  rank_zero_info("""{} = {}\n""".format(lowerCAmelCase__					,      str(metrics[key]     )     )     )




   def  _UpperCamelCase		(    self					,      lowerCAmelCase__					,      lowerCAmelCase__     )				->     Tuple:
        """simple docstring"""





        rank_zero_info("""***** Test results *****"""     )
        _UpperCamelCase  :List[str]       =trainer.callback_metrics
        # Log and save results to file
        _UpperCamelCase  :Dict       =os.path.join(pl_module.hparams.output_dir					,      """test_results.txt"""     )
        with open(lowerCAmelCase__					,      """w"""     ) as writer:
             for key in sorted(lowerCAmelCase__     ):
                  if key not in ["log", "progress_bar"]:
                       rank_zero_info("""{} = {}\n""".format(lowerCAmelCase__					,      str(metrics[key]     )     )     )
                       writer.write("""{} = {}\n""".format(lowerCAmelCase__					,      str(metrics[key]     )     )     )




def  _lowerCAmelCase				(				__a			,      __a      )  ->      None:
     '''simple docstring'''







     parser.add_argument(
         """--output_dir"""			,      default=__a			,      type=__a			,      required=__a			,      help="""The output directory where the model predictions and checkpoints will be written."""			,      )
     parser.add_argument(
         """--fp16"""			,      action="""store_true"""			,      help="""Whether to use 16-bit (mixed) precision (through NVIDIA apex) instead of 32-bit"""			,      )

     parser.add_argument(
         """--fp16_opt_level"""			,      type=__a			,      default="""O2"""			,      help=(
             """For fp16: Apex AMP optimization level selected in ['O0', 'O1', 'O2', and 'O3']."""
             """See details at https://nvidia.github.io/apex/amp.html"""
         )			,      )
     parser.add_argument("""--n_tpu_cores"""			,      dest="""tpu_cores"""			,      type=__a      )
     parser.add_argument("""--max_grad_norm"""			,      dest="""gradient_clip_val"""			,      default=1.0			,      type=__a			,      help="""Max gradient norm"""      )
     parser.add_argument("""--do_train"""			,      action="""store_true"""			,      help="""Whether to run training."""      )
     parser.add_argument("""--do_predict"""			,      action="""store_true"""			,      help="""Whether to run predictions on the test set."""      )
     parser.add_argument(
         """--gradient_accumulation_steps"""			,      dest="""accumulate_grad_batches"""			,      type=__a			,      default=1			,      help="""Number of updates steps to accumulate before performing a backward/update pass."""			,      )
     parser.add_argument("""--seed"""			,      type=__a			,      default=42			,      help="""random seed for initialization"""      )
     parser.add_argument(
         """--data_dir"""			,      default=__a			,      type=__a			,      required=__a			,      help="""The input data dir. Should contain the training files for the CoNLL-2003 NER task."""			,      )



def  _lowerCAmelCase				(				__a			,      __a			,      __a=None			,      __a=True			,      __a=[]			,      __a=None			,      __a=None			,      **__a			,      )  ->      str:
     '''simple docstring'''







     pl.seed_everything(args.seed      )

     # init model
     _UpperCamelCase  :Any       =Path(model.hparams.output_dir      )
     odir.mkdir(exist_ok=__a      )

     # add custom checkpoints
     if checkpoint_callback is None:
          _UpperCamelCase  :Dict       =pl.callbacks.ModelCheckpoint(
              filepath=args.output_dir			,      prefix="""checkpoint"""			,      monitor="""val_loss"""			,      mode="""min"""			,      save_top_k=1      )
     if early_stopping_callback:
          extra_callbacks.append(__a      )
     if logging_callback is None:
          _UpperCamelCase  :List[Any]       =LoggingCallback()

     _UpperCamelCase  :Union[str, Any]       ={}

     # TODO: remove with PyTorch 1.6 since pl uses native amp
     if args.fpaa:
          _UpperCamelCase  :Optional[Any]       =16
          _UpperCamelCase  :int       =args.fpaa_opt_level

     if args.gpus > 1:
          _UpperCamelCase  :int       ="""ddp"""

     _UpperCamelCase  :List[str]       =args.accumulate_grad_batches
     _UpperCamelCase  :Tuple       =extra_train_kwargs.get("""accelerator"""			,      __a      )
     _UpperCamelCase  :Optional[int]       =extra_train_kwargs.get("""profiler"""			,      __a      )

     _UpperCamelCase  :Any       =pl.Trainer.from_argparse_args(
         __a			,      weights_summary=__a			,      callbacks=[logging_callback] + extra_callbacks			,      logger=__a			,      checkpoint_callback=__a			,      **__a			,      )

     if args.do_train:
          trainer.fit(__a      )

     return trainer



"""simple docstring"""






from __future__ import annotations

import sys


class       lowerCamelCase_		:





				"""simple docstring"""







				def __init__(    self							,		UpperCAmelCase__							,		UpperCAmelCase__  ):
								SCREAMING_SNAKE_CASE__  				=					letter
								SCREAMING_SNAKE_CASE__  				=					freq
								SCREAMING_SNAKE_CASE__  				=					{}






				def __repr__(    self  ):
								return f'''{self.letter}:{self.freq}'''


class       lowerCamelCase_		:





				"""simple docstring"""







				def __init__(    self							,		UpperCAmelCase__							,		UpperCAmelCase__							,		UpperCAmelCase__  ):
								SCREAMING_SNAKE_CASE__  				=					freq
								SCREAMING_SNAKE_CASE__  				=					left
								SCREAMING_SNAKE_CASE__  				=					right


def __lowercase  (   lowerCamelCase_	:   str	):
				SCREAMING_SNAKE_CASE__  				=					{}
				with open(lowerCamelCase_	) as f:
								while True:
												SCREAMING_SNAKE_CASE__  				=					f.read(1	)
												if not c:
																break
												SCREAMING_SNAKE_CASE__  				=					chars[c] + 1 if c in chars else 1
				return sorted((Letter(lowerCamelCase_    ,       lowerCamelCase_	) for c, f in chars.items())    ,       key=lambda lowerCamelCase_	: x.freq	)


def __lowercase  (   lowerCamelCase_	:   list[Letter]	):
				SCREAMING_SNAKE_CASE__  				=					letters  # type: ignore
				while len(lowerCamelCase_	) > 1:
								SCREAMING_SNAKE_CASE__  				=					response.pop(0	)
								SCREAMING_SNAKE_CASE__  				=					response.pop(0	)
								SCREAMING_SNAKE_CASE__  				=					left.freq + right.freq
								SCREAMING_SNAKE_CASE__  				=					TreeNode(lowerCamelCase_    ,       lowerCamelCase_    ,       lowerCamelCase_	)
								response.append(lowerCamelCase_	)
								response.sort(key=lambda lowerCamelCase_	: x.freq	)
				return response[0]


def __lowercase  (   lowerCamelCase_	:   Letter | TreeNode    ,       lowerCamelCase_	:   str	):
				if isinstance(lowerCamelCase_    ,       lowerCamelCase_	):
								SCREAMING_SNAKE_CASE__  				=					bitstring
								return [root]
				SCREAMING_SNAKE_CASE__  				=					root  # type: ignore
				SCREAMING_SNAKE_CASE__  				=					[]
				letters += traverse_tree(treenode.left    ,       bitstring + "0"	)
				letters += traverse_tree(treenode.right    ,       bitstring + "1"	)
				return letters


def __lowercase  (   lowerCamelCase_	:   str	):
				SCREAMING_SNAKE_CASE__  				=					parse_file(lowerCamelCase_	)
				SCREAMING_SNAKE_CASE__  				=					build_tree(lowerCamelCase_	)
				SCREAMING_SNAKE_CASE__  				=					{
				    k: v for letter in traverse_tree(lowerCamelCase_    ,       ""	) for k, v in letter.bitstring.items()
				}
				print(F'''Huffman Coding  of {file_path}: '''	)
				with open(lowerCamelCase_	) as f:
								while True:
												SCREAMING_SNAKE_CASE__  				=					f.read(1	)
												if not c:
																break
												print(letters[c]    ,       end=" "	)
				print()


if __name__ == "__main__":
	# pass the file path to the huffman function
	huffman(sys.argv[1])
