code: 
  
  
  
  from __future__ import annotations
  
  from collections.abc import Iterable
  from dataclasses import dataclass
  from typing import Any
  
  
  
  class        lowerCAmelCase_	:
         UpperCAmelCase__       :      Optional[Any]       =						("_front", "_back", "_len")
  
  
  
         @dataclass
         class        lowerCAmelCase_	:
                UpperCAmelCase__       :      Any       =						None
                UpperCAmelCase__       :      Deque._Node | None       =						None
                UpperCAmelCase__       :      Deque._Node | None       =						None
  
  
  
  
  
  
         class        lowerCAmelCase_	:
                UpperCAmelCase__       :      Dict       =						("_cur",)
                def __init__(    self,    SCREAMING_SNAKE_CASE_ )  ->	None:
                   UpperCamelCase					:						int					=			cur
                def __iter__(    self )  ->	Deque._Iterator:
                   return self
  
  
  
  
  
  
                def       snake_case_ (    self )  ->	Any:
                   if self._cur is None:
                      # finished iterating
                      raise StopIteration
                   UpperCamelCase					:						Optional[int]					=			self._cur.val
                   UpperCamelCase					:						Optional[int]					=			self._cur.next_node
  
                   return val
  
  
  
  
  
  
         def __init__(    self,    SCREAMING_SNAKE_CASE_ = None )  ->	None:
            UpperCamelCase					:						Any					=			None
            UpperCamelCase					:						Any					=			None
            UpperCamelCase					:						int					=			0
  
            if iterable is not None:
               # append every value to the deque
               for val in iterable:
                  self.append(SCREAMING_SNAKE_CASE_ )
         def       snake_case_ (    self,    SCREAMING_SNAKE_CASE_ )  ->	None:
            UpperCamelCase					:						Tuple					=			self._Node(SCREAMING_SNAKE_CASE_,    SCREAMING_SNAKE_CASE_,    SCREAMING_SNAKE_CASE_ )
            if self.is_empty():
               # front = back
               UpperCamelCase					:						Any					=			node
               UpperCamelCase					:						Optional[int]					=			1
            else:
               # connect nodes
               UpperCamelCase					:						Optional[int]					=			node
               UpperCamelCase					:						Dict					=			self._back
               UpperCamelCase					:						Dict					=			node  # assign new back to the new node
  
               self._len += 1
  
               # make sure there were no errors
               assert not self.is_empty(), "Error on appending value."
         def       snake_case_ (    self,    SCREAMING_SNAKE_CASE_ )  ->	None:
            UpperCamelCase					:						Optional[Any]					=			self._Node(SCREAMING_SNAKE_CASE_,    SCREAMING_SNAKE_CASE_,    SCREAMING_SNAKE_CASE_ )
            if self.is_empty():
               # front = back
               UpperCamelCase					:						Optional[int]					=			node
               UpperCamelCase					:						Optional[Any]					=			1
            else:
               # connect nodes
               UpperCamelCase					:						str					=			self._front
               UpperCamelCase					:						Union[str, Any]					=			node
               UpperCamelCase					:						List[Any]					=			node  # assign new front to the new node
  
               self._len += 1
  
               # make sure there were no errors
               assert not self.is_empty(), "Error on appending value."
         def       snake_case_ (    self,    SCREAMING_SNAKE_CASE_ )  ->	None:
            for val in iterable:
               self.append(SCREAMING_SNAKE_CASE_ )
         def       snake_case_ (    self,    SCREAMING_SNAKE_CASE_ )  ->	None:
            for val in iterable:
               self.appendleft(SCREAMING_SNAKE_CASE_ )
         def       snake_case_ (    self )  ->	Any:
            assert not self.is_empty(), "Deque is empty."
  
            UpperCamelCase					:						List[Any]					=			self._back
            UpperCamelCase					:						Any					=			self._back.prev_node  # set new back
            # drop the last node - python will deallocate memory automatically
            UpperCamelCase					:						Optional[int]					=			None
  
            self._len -= 1
  
            return topop.val
         def       snake_case_ (    self )  ->	Any:
            assert not self.is_empty(), "Deque is empty."
  
            UpperCamelCase					:						int					=			self._front
            UpperCamelCase					:						Dict					=			self._front.next_node  # set new front and drop the first node
            UpperCamelCase					:						int					=			None
  
            self._len -= 1
  
            return topop.val
         def       snake_case_ (    self )  ->	bool:
            return self._front is None
         def __len__(    self )  ->	int:
            return self._len
         def __eq__(    self,    SCREAMING_SNAKE_CASE_ )  ->	bool:
  
            if not isinstance(SCREAMING_SNAKE_CASE_,    SCREAMING_SNAKE_CASE_ ):
               return NotImplemented
  
            UpperCamelCase					:						int					=			self._front
            UpperCamelCase					:						List[str]					=			other._front
  
            # if the length of the dequeues are not the same, they are not equal
            if len(self ) != len(SCREAMING_SNAKE_CASE_ ):
               return False
  
            while me is not None and oth is not None:
               # compare every value
               if me.val != oth.val:
                  return False
               UpperCamelCase					:						Union[str, Any]					=			me.next_node
               UpperCamelCase					:						Tuple					=			oth.next_node
  
            return True
         def __iter__(    self )  ->	Deque._Iterator:
            return Deque._Iterator(self._front )
  
  
  
  
  
  
         def __repr__(    self )  ->	str:
            UpperCamelCase					:						Any					=			[]
            UpperCamelCase					:						str					=			self._front
            while aux is not None:
               # append the values in a list to display
               values_list.append(aux.val )
               UpperCamelCase					:						Union[str, Any]					=			aux.next_node
  
            return F"""[{", ".join(repr(SCREAMING_SNAKE_CASE_ ) for val in values_list )}]"""
  
  
  if __name__ == "__main__":
      import doctest
  
      doctest.testmod()
  
  
  
  
style_context: 
  
  
  
  import json
  import logging
  import os
  import subprocess
  from argparse import ArgumentParser
  
  
  __UpperCAmelCase      = logging.getLogger(__name__)
  def 	UpperCamelCase			(     )			->  List[str]:
     UpperCamelCase					:						Union[str, Any]					=			ArgumentParser()
     UpperCamelCase			,  UpperCamelCase					:						Optional[int]					=			parser.parse_known_args()
     for arg in unknown:
        if arg.startswith(('-', '--')			):
           parser.add_argument(arg.split('='			)[0]			)
  
     return parser.parse_args()
  def 	UpperCamelCase			(     )			->  Optional[Any]:
     UpperCamelCase					:						int					=			parse_args()
     UpperCamelCase					:						Dict					=			8888
     UpperCamelCase					:						Union[str, Any]					=			int(os.environ['SM_NUM_GPUS']			)
     UpperCamelCase					:						Optional[Any]					=			json.loads(os.environ['SM_HOSTS']			)
     UpperCamelCase					:						Dict					=			len(snake_case__			)
     UpperCamelCase					:						int					=			os.environ['SM_CURRENT_HOST']
     UpperCamelCase					:						List[str]					=			hosts.index(snake_case__			)
     UpperCamelCase					:						Optional[Any]					=			'INFO'
  
     if num_nodes > 1:
        UpperCamelCase					:						List[Any]					=			F"""python -m torch.distributed.launch \
                  --nnodes={num_nodes}  \
                  --node_rank={rank}  \
                  --nproc_per_node={num_gpus}  \
                  --master_addr={hosts[0]}  \
                  --master_port={port} \
                  ./run_glue.py \
                  {"".join(["nested fstring" for parameter,value in args.__dict__.items()]			)}"""
     else:
        UpperCamelCase					:						Any					=			F"""python -m torch.distributed.launch \
              --nproc_per_node={num_gpus}  \
              ./run_glue.py \
              {"".join(["nested fstring" for parameter,value in args.__dict__.items()]			)}"""
     try:
        subprocess.run(snake_case__ ,  shell=snake_case__			)
     except Exception as e:
        logger.info(snake_case__			)
  
  
  if __name__ == "__main__":
      main()
  
  
  
  