code: def formatted_file_name(input_file_name, input_name):
      res = input_file_name + "_"
      for c in input_name:
          res += c if c.isalnum() else "_"
      return res
  
imports: from __future__ import absolute_import
  from __future__ import division
  from __future__ import print_function
  import inspect
  import hashlib
  import filelock
  import errno
  import os
  import sys
  import shutil
  import traceback
label_desc: Use image node_id 3 for calling a global function with example usage: formatted_file_name(input_file_name, input_name) and returns: res