docs: def integer_fractional_parts(number):
      """
      Returns a tuple of the integer and fractional parts of a number.
  
      Args:
          number(iterable container): A number in the following form:
              (..., ".", int, int, int, ...)
  
      Returns:
          (integer_part, fractional_part): tuple.
  
      Example:
          >>> integer_fractional_parts((1,2,3,".",4,5,6))
          ((1, 2, 3), ('.', 4, 5, 6))
      """
      radix_point = number.index(".")
      integer_part = number[:radix_point]
      fractional_part = number[radix_point:]
      return(integer_part, fractional_part)