code: def remove_control_chars(text):
      """remove unprintable characters"""
      return control_char_re.sub("", text)
  
imports: import argparse
  import collections
  import itertools
  import os
  import random
  import re
  import sys
label_desc: Use image node_id 1 for calling a global function with example usage: remove_control_chars(text) and returns: control_char_re