code: def _get_path():
      
      if _path:
          return _path[0]
      environ_paths = set(os.environ['PATH'].split(':'))
      environ_paths.add('/usr/local/bin')
      environ_paths.add('/usr/bin')
      _path.append(':'.join(environ_paths))
      logger.debug('PATH = %s', _path[-1])
      return _path[0]
docs: Guarantee that /usr/local/bin and /usr/bin are in PATH