def start(self):
    """Start watching the directory for changes."""
    with self._inotify_fd_lock:
      if self._inotify_fd < 0:
        return
      self._inotify_poll.register(self._inotify_fd, select.POLLIN)
      for directory in self._directories:
        self._add_watch_for_path(directory)
dataset/ETHPy150Open GoogleCloudPlatform/python-compat-runtime/appengine-compat/exported_appengine_sdk/google/appengine/tools/devappserver2/inotify_file_watcher.py/InotifyFileWatcher.start/original