code: def complement(input_number):
      """
      Calculate complement of input number.
  
      :param input_number: input number
      :type input_number: float
      :return: complement as float
      """
      try:
          return 1 - input_number
      except Exception:
          return "None"
  
imports: from __future__ import division
  import sys
  import math
  import numpy
  import re
  from .pycm_param import *
  from .pycm_error import pycmMatrixError
  from warnings import warn
  from functools import wraps
label_desc: Use image node_id 20 for calling a global function with example usage: complement(input_number) and returns: unknown, str