SCREAMING_SNAKE_CASE__		:       int       						=       "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/"







def      _a					(   lowercase__	:      bytes			):







     '''simple docstring'''


     if not isinstance(lowercase__  ,	lowercase__			):
          SCREAMING_SNAKE_CASE__					:					Optional[int]      =		f'''a bytes-like object is required, not \'{data.__class__.__name__}\''''
          raise TypeError(lowercase__			)

     SCREAMING_SNAKE_CASE__					:					Optional[Any]      =		''.join(bin(lowercase__			)[2:].zfill(8			) for byte in data			)

     SCREAMING_SNAKE_CASE__					:					Any      =		len(lowercase__			) % 6 != 0

     if padding_needed:
          # The padding that will be added later
          SCREAMING_SNAKE_CASE__					:					List[Any]      =		b'=' * ((6 - len(lowercase__			) % 6) // 2)

          # Append binary_stream with arbitrary binary digits (0's by default) to make its
          # length a multiple of 6.
          binary_stream += "0" * (6 - len(lowercase__			) % 6)
     else:
          SCREAMING_SNAKE_CASE__					:					Optional[int]      =		b''

     # Encode every 6 binary digits to their corresponding Base64 character
     return (
         "".join(
             B64_CHARSET[int(binary_stream[index : index + 6]  ,	2			)]
             for index in range(0  ,	len(lowercase__			)  ,	6			)			).encode()
         + padding
     )







def      _a					(   lowercase__	:      str			):







     '''simple docstring'''


     if not isinstance(lowercase__  ,	lowercase__			) and not isinstance(lowercase__  ,	lowercase__			):
          SCREAMING_SNAKE_CASE__					:					List[str]      =		(
              'argument should be a bytes-like object or ASCII string, '
              f'''not \'{encoded_data.__class__.__name__}\''''
          )
          raise TypeError(lowercase__			)

     # In case encoded_data is a bytes-like object, make sure it contains only
     # ASCII characters so we convert it to a string object
     if isinstance(lowercase__  ,	lowercase__			):
          try:
               SCREAMING_SNAKE_CASE__					:					str      =		encoded_data.decode('utf-8'			)
          except UnicodeDecodeError:
               raise ValueError('base64 encoded data should only contain ASCII characters'			)

     SCREAMING_SNAKE_CASE__					:					int      =		encoded_data.count('='			)

     # Check if the encoded string contains non base64 characters
     if padding:
          assert all(
              char in B64_CHARSET for char in encoded_data[:-padding]			), "Invalid base64 character(s) found."
     else:
          assert all(
              char in B64_CHARSET for char in encoded_data			), "Invalid base64 character(s) found."

     # Check the padding
     assert len(lowercase__			) % 4 == 0 and padding < 3, "Incorrect padding"

     if padding:
          # Remove padding if there is one
          SCREAMING_SNAKE_CASE__					:					int      =		encoded_data[:-padding]

          SCREAMING_SNAKE_CASE__					:					List[str]      =		''.join(
              bin(B64_CHARSET.index(lowercase__			)			)[2:].zfill(6			) for char in encoded_data			)[: -padding * 2]
     else:
          SCREAMING_SNAKE_CASE__					:					List[str]      =		''.join(
              bin(B64_CHARSET.index(lowercase__			)			)[2:].zfill(6			) for char in encoded_data			)

     SCREAMING_SNAKE_CASE__					:					Optional[int]      =		[
         int(binary_stream[index : index + 8]  ,	2			)
         for index in range(0  ,	len(lowercase__			)  ,	8			)
     ]

     return bytes(lowercase__			)


if __name__ == "__main__":
      import doctest

      doctest.testmod()







_lowerCAmelCase:						List[str]   				=       'ABCDEFGHIJKLMNOPQRSTUVWXYZ'






def   _lowercase(					):
							a__      =input('Enter message: '     )
							a__      =input('Enter key [alphanumeric]: '     )
							a__      =input('Encrypt/Decrypt [e/d]: '     )

							if mode.lower().startswith('e'     ):
														a__      ='encrypt'
														a__      =encrypt_message(__a    ,     __a     )
							elif mode.lower().startswith('d'     ):
														a__      ='decrypt'
														a__      =decrypt_message(__a    ,     __a     )

							print(f"""\n{mode.title()}ed message:"""     )
							print(__a     )






def   _lowercase(					__a				:						str    ,     __a				:						str     ):
							return translate_message(__a    ,     __a    ,     'encrypt'     )






def   _lowercase(					__a				:						str    ,     __a				:						str     ):
							return translate_message(__a    ,     __a    ,     'decrypt'     )






def   _lowercase(					__a				:						str    ,     __a				:						str    ,     __a				:						str     ):
							a__      =[]
							a__      =0
							a__      =key.upper()

							for symbol in message:
														a__      =LETTERS.find(symbol.upper()     )
														if num != -1:
																					if mode == "encrypt":
																												num += LETTERS.find(key[key_index]     )
																					elif mode == "decrypt":
																												num -= LETTERS.find(key[key_index]     )

																					num %= len(__a     )

																					if symbol.isupper():
																												translated.append(LETTERS[num]     )
																					elif symbol.islower():
																												translated.append(LETTERS[num].lower()     )

																					key_index += 1
																					if key_index == len(__a     ):
																												a__      =0
														else:
																					translated.append(__a     )
							return "".join(__a     )


if __name__ == "__main__":
	main()

