input: def generate_6_digit_number() -> int:
      """Generates a random 6-digit number.
      
      >>> generate_6_digit_number() in range(100000, 1000000)
      True
      >>> generate_6_digit_number() != generate_6_digit_number()
      True
      """
      import random
      return random.randint(100000, 999999)
output:     import random
      return random.randint(100000, 999999)