code: 
  
  
  
  
  
  import abc
  import copy
  import dataclasses
  from dataclasses import dataclass
  from typing import ClassVar, Dict, Type, TypeVar
  
  from ..features import Features
  
  
  UpperCAmelCase			:			Dict	  = TypeVar("""T""", bound="""TaskTemplate""")
  
  
  
  
  
  
  
  @dataclass(frozen=UpperCamelCase__)
  class        __lowerCAmelCase (					abc.ABC):
        # `task` is not a ClassVar since we want it to be part of the `asdict` output for JSON serialization
        _lowercase       :      str
        _lowercase       :      ClassVar[Features]
        _lowercase       :      ClassVar[Features]
  
  
  
  
  
  
  
        def      _lowercase						(					self	,   lowerCAmelCase__							)     ->		T:
  
  
  
          '''simple docstring'''
  
  
  
  
          return copy.deepcopy(self							)
  
  
  
  
  
  
  
        @property
        def      _lowercase						(					self							)     ->		Features:
  
  
  
          '''simple docstring'''
  
  
  
  
          return Features(**self.input_schema	,   **self.label_schema							)
  
  
  
  
  
  
  
        @property
        @abc.abstractmethod
        def      _lowercase						(					self							)     ->		Dict[str, str]:
  
  
  
          '''simple docstring'''
  
  
  
  
          raise NotImplementedError
  
  
  
  
  
  
  
        @classmethod
        def      _lowercase						(					cls	,   lowerCAmelCase__							)     ->		T:
  
  
  
          '''simple docstring'''
  
  
  
  
          a__			:      Any            ={f.name for f in dataclasses.fields(cls							)}
          return cls(**{k: v for k, v in template_dict.items() if k in field_names}							)
  
  
  
  
  
  
  
style_context: 
  
  
  
  
  
  def   _A (	SCREAMING_SNAKE_CASE  :     int		):
  
  
  
  
  
    """simple docstring"""
  
  
  
    barcode //= 10  # exclude the last digit
    a__			:      int            =False
    a__			:      List[str]            =0
  
    # extract and check each digit
    while barcode != 0:
      a__			:      Optional[Any]            =1 if checker else 3
      s += mult * (barcode % 10)
      barcode //= 10
      a__			:      Union[str, Any]            =not checker
  
    return (10 - (s % 10)) % 10
  def   _A (	SCREAMING_SNAKE_CASE  :     int		):
  
  
  
  
  
    """simple docstring"""
  
  
  
    return len(str(SCREAMING_SNAKE_CASE		)		) == 13 and get_check_digit(SCREAMING_SNAKE_CASE		) == barcode % 10
  def   _A (	SCREAMING_SNAKE_CASE  :     str		):
  
  
  
  
  
    """simple docstring"""
  
  
  
    if str(SCREAMING_SNAKE_CASE		).isalpha():
      a__			:      Tuple            =f'''Barcode \'{barcode}\' has alphabetic characters.'''
      raise ValueError(SCREAMING_SNAKE_CASE		)
    elif int(SCREAMING_SNAKE_CASE		) < 0:
      raise ValueError("The entered barcode has a negative value. Try again."		)
    else:
      return int(SCREAMING_SNAKE_CASE		)
  
  
  if __name__ == "__main__":
       import doctest
  
       doctest.testmod()
       UpperCAmelCase			:			List[str]	  = get_barcode(input("""Barcode: """).strip())
  
       if is_valid(barcode):
            print(F"""'{barcode}' is a valid barcode.""")
       else:
            print(F"""'{barcode}' is NOT a valid barcode.""")
  
  
  
  
  
  
  