code: def _string_lower(s):
      """
      Convenience function to lowercase a string (the :mod:`string` module is
      deprecated/removed in Python 3.0).
  
      :param s:
          The string which will be lowercased.
      :returns:
          Lowercased copy of string s.
      """
      return s.lower()
  
imports: from fnmatch import fnmatch, fnmatchcase
label_desc: Use image node_id 1 for calling a global function with example usage: _string_lower(s) and returns: s