code: def remove_non_ascii(input_string):
      """Remove non-ascii characters
      Source: http://stackoverflow.com/a/1342373
      """
      no_ascii = "".join(i for i in input_string if ord(i) < 128)
      return no_ascii
  
file_path: cltk/src/cltk/alphabet/text_normalization.py
imports: from typing import List, Optional
  from unicodedata import normalize
label_desc: Use image node_id 2 for calling a global function with example usage: remove_non_ascii(input_string) and returns: no_ascii