code: def rounder(input_number, digit=5):
      """
      Round the input number and convert it to str.
  
      :param input_number: input number
      :type input_number: anything
      :param digit: scale (number of fraction digits)(default value: 5)
      :type digit: int
      :return: round number as str
      """
      if isinstance(input_number, tuple):
          tuple_list = list(input_number)
          tuple_str = []
          for i in tuple_list:
              if isfloat(i):
                  tuple_str.append(str(numpy.around(i, digit)))
              else:
                  tuple_str.append(str(i))
          return "(" + ",".join(tuple_str) + ")"
      if isfloat(input_number):
          return str(numpy.around(input_number, digit))
      return str(input_number)
  
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 3 for calling a global function with example usage: rounder(input_number, digit) and returns: str, unknown, str