class_docstr: Telnet server implementation.
docstr: Process callbacks from `call_from_executor` in eventloop.
docstr_tok: ["Process","callbacks","from","`","call_from_executor","`","in","eventloop","."]
code: def _process_callbacks(self):
      """
      Process callbacks from `call_from_executor` in eventloop.
      """
      # Flush all the pipe content.
      os.read(self._schedule_pipe[0], 1024)
  
      # Process calls from executor.
      calls_from_executor, self._calls_from_executor = (
          self._calls_from_executor,
          [],
      )
      for c in calls_from_executor:
          c()
  
imports: from __future__ import unicode_literals
  import socket
  import select
  import threading
  import os
  import fcntl
  from six import int2byte, text_type, binary_type
  from codecs import getincrementaldecoder
  from prompt_toolkit.enums import DEFAULT_BUFFER
  from prompt_toolkit.eventloop.base import EventLoop
  from prompt_toolkit.interface import CommandLineInterface, Application
  from prompt_toolkit.layout.screen import Size
  from prompt_toolkit.shortcuts import create_prompt_application
  from prompt_toolkit.terminal.vt100_input import InputStream
  from prompt_toolkit.terminal.vt100_output import Vt100_Output
  from .log import logger
  from .protocol import IAC, DO, LINEMODE, SB, MODE, SE, WILL, ECHO, NAWS, SUPPRESS_GO_AHEAD
  from .protocol import TelnetProtocolParser
  from .application import TelnetApplication
label_desc: Use image node_id 5 for calling the TelnetServer obj's underlying member method code with example usage: obj._process_callbacks() without return types