class_docstr: A stateful poll interface that mirrors Python's built-in poll.
class_docstr_tok: ["A","stateful","poll","interface","that","mirrors","Python","'s","built-in","poll","."]
code: def __contains__(self, socket: Any) -> bool:
      return socket in self._map
  
file_path: catboost/contrib/python/pyzmq/py3/zmq/sugar/poll.py
imports: from typing import Any, Dict, List, Optional, Tuple
  from zmq.backend import zmq_poll
  from zmq.constants import POLLERR, POLLIN, POLLOUT
label_desc: Use image node_id 2 for calling the Poller obj's underlying member method code with example usage: obj.__contains__(socket) and returns: unknown