code: def is_fnmatch_regex(string):
      
      is_regex = False
      regex_chars = ['!', '*', '$']
      for c in regex_chars:
          if string.find(c) > -1:
              return True
      return is_regex
docs: Returns True if the given string is considered a fnmatch
      regular expression, False otherwise.
      It will look for
  
      :param string: str