code: import argparse
  import os
  import re
  
  
  # All paths are set with the intent you should run this script from the root of the repo with the command
  # python utils/check_dummies.py
  lowerCamelCase__	    =				"src/transformers"
  
  # Matches is_xxx_available()
  lowerCamelCase__	    =				re.compile(r'is\_([a-z_]*)_available()')
  # Matches from xxx import bla
  lowerCamelCase__	    =				re.compile(r'\s+from\s+\S*\s+import\s+([^\(\s].*)\n')
  lowerCamelCase__	    =				re.compile(r'^\s+if\s+not\s+\(?is\_[a-z_]*\_available\(\)')
  
  
  lowerCamelCase__	    =				"\n{0} = None\n"
  
  lowerCamelCase__	    =				"\nclass {0}(metaclass=DummyObject):\n    _backends = {1}\n\n    def __init__(self, *args, **kwargs):\n        requires_backends(self, {1})\n"
  
  
  lowerCamelCase__	    =				"\ndef {0}(*args, **kwargs):\n    requires_backends({0}, {1})\n"
  
  
  
  def 							_lowerCamelCase(				__snake_case	)  ->   int:
  
  
  
  
  
  
  
  		if _re_test_backend.search(__snake_case	) is None:
  				return None
  		__snake_case		       =     [b[0] for b in _re_backend.findall(__snake_case	)]
  		backends.sort()
  		return "_and_".join(__snake_case	)
  
  
  
  def 							_lowerCamelCase(				)  ->   List[Any]:
  
  
  
  
  
  
  
  		with open(os.path.join(__snake_case						,						"__init__.py"	)						,						"r"						,						encoding="utf-8"						,						newline="\n"	) as f:
  				__snake_case		       =     f.readlines()
  
  		# Get to the point we do the actual imports for type checking
  		__snake_case		       =     0
  		while not lines[line_index].startswith("if TYPE_CHECKING"	):
  				line_index += 1
  
  		__snake_case		       =     {}
  		# Go through the end of the file
  		while line_index < len(__snake_case	):
  				# If the line is an if is_backend_available, we grab all objects associated.
  				__snake_case		       =     find_backend(lines[line_index]	)
  				if backend is not None:
  						while not lines[line_index].startswith("    else:"	):
  								line_index += 1
  						line_index += 1
  
  						__snake_case		       =     []
  						# Until we unindent, add backend objects to the list
  						while len(lines[line_index]	) <= 1 or lines[line_index].startswith(" " * 8	):
  								__snake_case		       =     lines[line_index]
  								__snake_case		       =     _re_single_line_import.search(__snake_case	)
  								if single_line_import_search is not None:
  										objects.extend(single_line_import_search.groups()[0].split(", "	)	)
  								elif line.startswith(" " * 12	):
  										objects.append(line[12:-2]	)
  								line_index += 1
  
  						__snake_case		       =     objects
  				else:
  						line_index += 1
  
  		return backend_specific_objects
  
  
  
  def 							_lowerCamelCase(				__snake_case						,						__snake_case	)  ->   str:
  
  
  
  
  
  
  
  		if name.isupper():
  				return DUMMY_CONSTANT.format(__snake_case	)
  		elif name.islower():
  				return DUMMY_FUNCTION.format(__snake_case						,						__snake_case	)
  		else:
  				return DUMMY_CLASS.format(__snake_case						,						__snake_case	)
  
  
  
  def 							_lowerCamelCase(				__snake_case=None	)  ->   Optional[int]:
  
  
  
  
  
  
  
  		if backend_specific_objects is None:
  				__snake_case		       =     read_init()
  		# For special correspondence backend to module name as used in the function requires_modulename
  		__snake_case		       =     {}
  
  		for backend, objects in backend_specific_objects.items():
  				__snake_case		       =     "[" + ", ".join(f"""\"{b}\"""" for b in backend.split("_and_"	)	) + "]"
  				__snake_case		       =     "# This file is autogenerated by the command `make fix-copies`, do not edit.\n"
  				dummy_file += "from ..utils import DummyObject, requires_backends\n\n"
  				dummy_file += "\n".join([create_dummy_object(__snake_case						,						__snake_case	) for o in objects]	)
  				__snake_case		       =     dummy_file
  
  		return dummy_files
  
  
  
  def 							_lowerCamelCase(				__snake_case=False	)  ->   List[str]:
  		__snake_case		       =     create_dummy_files()
  		# For special correspondence backend to shortcut as used in utils/dummy_xxx_objects.py
  		__snake_case		       =     {"torch": "pt"}
  
  		# Locate actual dummy modules and read their content.
  		__snake_case		       =     os.path.join(__snake_case						,						"utils"	)
  		__snake_case		       =     {
  		    backend: os.path.join(__snake_case						,						f"""dummy_{short_names.get(__snake_case						,						__snake_case	)}_objects.py"""	)
  		    for backend in dummy_files.keys()
  		}
  
  		__snake_case		       =     {}
  		for backend, file_path in dummy_file_paths.items():
  				if os.path.isfile(__snake_case	):
  						with open(__snake_case						,						"r"						,						encoding="utf-8"						,						newline="\n"	) as f:
  								__snake_case		       =     f.read()
  				else:
  						__snake_case		       =     ""
  
  		for backend in dummy_files.keys():
  				if dummy_files[backend] != actual_dummies[backend]:
  						if overwrite:
  								print(
  								    f"""Updating transformers.utils.dummy_{short_names.get(__snake_case						,						__snake_case	)}_objects.py as the main """
  								    "__init__ has new objects."	)
  								with open(dummy_file_paths[backend]						,						"w"						,						encoding="utf-8"						,						newline="\n"	) as f:
  										f.write(dummy_files[backend]	)
  						else:
  								raise ValueError(
  								    "The main __init__ has objects that are not present in "
  								    f"""transformers.utils.dummy_{short_names.get(__snake_case						,						__snake_case	)}_objects.py. Run `make fix-copies` """
  								    "to fix this."	)
  
  
  if __name__ == "__main__":
  		lowerCamelCase__	    =				argparse.ArgumentParser()
  		parser.add_argument('--fix_and_overwrite', action='store_true', help='Whether to fix inconsistencies.')
  		lowerCamelCase__	    =				parser.parse_args()
  
  		check_dummies(args.fix_and_overwrite)
  
  
  
  
  
  
style_context: from __future__ import annotations
  
  from collections.abc import Iterable
  from dataclasses import dataclass
  from typing import Any
  
  
  
  
  class 					UpperCamelCase	:
  					__UpperCamelCase						=   ("""_front""", """_back""", """_len""")
  
  
  
  
  					@dataclass
  					class 					UpperCamelCase	:
  										__UpperCamelCase						=   None
  										__UpperCamelCase						=   None
  										__UpperCamelCase						=   None
  
  
  
  
  					class 					UpperCamelCase	:
  										__UpperCamelCase						=   ("""_cur""",)
  
  
  
  
  										def __init__( self :					Dict      ,_lowerCAmelCase :					Deque._Node | None						):
  
  
  												"""simple docstring"""
  
  
  
  
  												__snake_case		       =     cur
  
  
  
  
  										def __iter__( self :					Dict						):
  
  
  												"""simple docstring"""
  
  
  
  
  												return self
  
  
  
  
  
  
  
  										def 							UpperCamelCase_						( self :					Optional[Any]						):
  
  
  												"""simple docstring"""
  
  
  
  
  												if self._cur is None:
  														# finished iterating
  														raise StopIteration
  												__snake_case		       =     self._cur.val
  												__snake_case		       =     self._cur.next_node
  
  												return val
  
  
  
  
  					def __init__( self :					Optional[int]      ,_lowerCAmelCase :					Iterable[Any] | None = None						):
  
  
  							"""simple docstring"""
  
  
  
  
  							__snake_case		       =     None
  							__snake_case		       =     None
  							__snake_case		       =     0
  
  							if iterable is not None:
  									# append every value to the deque
  									for val in iterable:
  											self.append(_lowerCAmelCase						)
  
  
  
  
  					def 							UpperCamelCase_						( self :					int      ,_lowerCAmelCase :					Any						):
  
  
  							"""simple docstring"""
  
  
  
  
  							__snake_case		       =     self._Node(_lowerCAmelCase      ,_lowerCAmelCase      ,_lowerCAmelCase						)
  							if self.is_empty():
  									# front = back
  									__snake_case		       =     __snake_case		       =     node
  									__snake_case		       =     1
  							else:
  									# connect nodes
  									__snake_case		       =     node
  									__snake_case		       =     self._back
  									__snake_case		       =     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 							UpperCamelCase_						( self :					Any      ,_lowerCAmelCase :					Any						):
  
  
  							"""simple docstring"""
  
  
  
  
  							__snake_case		       =     self._Node(_lowerCAmelCase      ,_lowerCAmelCase      ,_lowerCAmelCase						)
  							if self.is_empty():
  									# front = back
  									__snake_case		       =     __snake_case		       =     node
  									__snake_case		       =     1
  							else:
  									# connect nodes
  									__snake_case		       =     self._front
  									__snake_case		       =     node
  									__snake_case		       =     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 							UpperCamelCase_						( self :					int      ,_lowerCAmelCase :					Iterable[Any]						):
  
  
  							"""simple docstring"""
  
  
  
  
  							for val in iterable:
  									self.append(_lowerCAmelCase						)
  
  
  
  
  					def 							UpperCamelCase_						( self :					Optional[int]      ,_lowerCAmelCase :					Iterable[Any]						):
  
  
  							"""simple docstring"""
  
  
  
  
  							for val in iterable:
  									self.appendleft(_lowerCAmelCase						)
  
  
  
  
  					def 							UpperCamelCase_						( self :					List[Any]						):
  
  
  							"""simple docstring"""
  
  
  
  
  							assert not self.is_empty(), "Deque is empty."
  
  							__snake_case		       =     self._back
  							__snake_case		       =     self._back.prev_node  # set new back
  							# drop the last node - python will deallocate memory automatically
  							__snake_case		       =     None
  
  							self._len -= 1
  
  							return topop.val
  
  
  
  
  					def 							UpperCamelCase_						( self :					List[str]						):
  
  
  							"""simple docstring"""
  
  
  
  
  							assert not self.is_empty(), "Deque is empty."
  
  							__snake_case		       =     self._front
  							__snake_case		       =     self._front.next_node  # set new front and drop the first node
  							__snake_case		       =     None
  
  							self._len -= 1
  
  							return topop.val
  
  
  
  
  					def 							UpperCamelCase_						( self :					int						):
  
  
  							"""simple docstring"""
  
  
  
  
  							return self._front is None
  
  
  
  
  					def __len__( self :					Tuple						):
  
  
  							"""simple docstring"""
  
  
  
  
  							return self._len
  
  
  
  
  					def __eq__( self :					Union[str, Any]      ,_lowerCAmelCase :					object						):
  
  
  							"""simple docstring"""
  
  
  
  
  							if not isinstance(_lowerCAmelCase      ,_lowerCAmelCase						):
  									return NotImplemented
  
  							__snake_case		       =     self._front
  							__snake_case		       =     other._front
  
  							# if the length of the dequeues are not the same, they are not equal
  							if len(self						) != len(_lowerCAmelCase						):
  									return False
  
  							while me is not None and oth is not None:
  									# compare every value
  									if me.val != oth.val:
  											return False
  									__snake_case		       =     me.next_node
  									__snake_case		       =     oth.next_node
  
  							return True
  
  
  
  
  					def __iter__( self :					Tuple						):
  
  
  							"""simple docstring"""
  
  
  
  
  							return Deque._Iterator(self._front						)
  
  
  
  
  
  
  
  					def __repr__( self :					List[Any]						):
  
  
  							"""simple docstring"""
  
  
  
  
  							__snake_case		       =     []
  							__snake_case		       =     self._front
  							while aux is not None:
  									# append the values in a list to display
  									values_list.append(aux.val						)
  									__snake_case		       =     aux.next_node
  
  							return F"""[{", ".join(repr(_lowerCAmelCase						) for val in values_list						)}]"""
  
  
  if __name__ == "__main__":
  		import doctest
  
  		doctest.testmod()
  
  
  
  
  
  