code: def add_channel(self, map=None):
      # self.log_info('adding channel %s' % self)
      if map is None:
          map = self._map
      map[self._fileno] = self
  
imports: import select
  import socket
  import sys
  import time
  import warnings
  import os
  from errno import EALREADY, EINPROGRESS, EWOULDBLOCK, ECONNRESET, EINVAL, ENOTCONN, ESHUTDOWN, EISCONN, EBADF, ECONNABORTED, EPIPE, EAGAIN, errorcode
label_desc: Use image node_id 3 for calling the dispatcher obj's underlying member method code with example usage: obj.add_channel(map) without return types