code: def select(self, timeout):
      tuples = self._poll.poll(timeout)  # Returns (fd, event) tuples.
      return [t[0] for t in tuples]
  
imports: from __future__ import unicode_literals, absolute_import
  import sys
  import abc
  import errno
  import select
  import six
label_desc: Use image node_id 4 for calling the PollSelector obj's underlying member method code with example usage: obj.select(timeout) and returns: unknown