






from __future__ import annotations

from collections.abc import Generator
def       a__						(  A					):
   if not isinstance(A		,				A					) or n < 1:
      raise Exception("""Sequence only defined for positive integers"""					)

   yield n
   while n != 1:
      if n % 2 == 0:
         n //= 2
      else:
         lowercase__						:	str         = 3 * n + 1
      yield n
def       a__						(  ):
   lowercase__						:	List[str]         = 43
   lowercase__						:	Tuple         = tuple(collatz_sequence(A					)					)
   print(A					)
   print(F'''Collatz sequence from {n} took {len(A					)} steps.'''					)


if __name__ == "__main__":
 main()










import os
import sys
import time

from . import transposition_cipher as trans_cipher
def       a__						(  ):
   lowercase__						:	Union[str, Any]         = """Prehistoric Men.txt"""
   lowercase__						:	Optional[Any]         = """Output.txt"""
   lowercase__						:	List[str]         = int(input("""Enter key: """					)					)
   lowercase__						:	Tuple         = input("""Encrypt/Decrypt [e/d]: """					)

   if not os.path.exists(A					):
      print(F'''File {input_file} does not exist. Quitting...'''					)
      sys.exit()
   if os.path.exists(A					):
      print(F'''Overwrite {output_file}? [y/n]'''					)
      lowercase__						:	List[Any]         = input("""> """					)
      if not response.lower().startswith("""y"""					):
         sys.exit()

   lowercase__						:	str         = time.time()
   if mode.lower().startswith("""e"""					):
      with open(A					) as f:
         lowercase__						:	Optional[int]         = f.read()
      lowercase__						:	List[str]         = trans_cipher.encrypt_message(A		,				A					)
   elif mode.lower().startswith("""d"""					):
      with open(A					) as f:
         lowercase__						:	int         = f.read()
      lowercase__						:	int         = trans_cipher.decrypt_message(A		,				A					)

   with open(A		,				"""w"""					) as output_obj:
      output_obj.write(A					)

   lowercase__						:	Optional[Any]         = round(time.time() - start_time		,				2					)
   print(("""Done (""", total_time, """seconds )""")					)


if __name__ == "__main__":
 main()


