class_docstr: Event loop for posix systems (Linux, Mac os X).
docstr: Return the file descriptors that are ready for reading.
docstr_tok: ["Return","the","file","descriptors","that","are","ready","for","reading","."]
code: def _ready_for_reading(self, timeout=None):
      """
      Return the file descriptors that are ready for reading.
      """
      fds = self.selector.select(timeout)
      return fds
  
imports: from __future__ import unicode_literals
  import fcntl
  import os
  import signal
  import threading
  import time
  from prompt_toolkit.terminal.vt100_input import InputStream
  from prompt_toolkit.utils import DummyContext, in_main_thread
  from prompt_toolkit.input import Input
  from .base import EventLoop, INPUT_TIMEOUT
  from .callbacks import EventLoopCallbacks
  from .inputhook import InputHookContext
  from .posix_utils import PosixStdinReader
  from .utils import TimeIt
  from .select import AutoSelector, Selector, fd_to_int
label_desc: Use image node_id 3 for calling the PosixEventLoop obj's underlying member method code with example usage: obj._ready_for_reading(timeout) and returns: fds