ioloop.py 文件源码

def backport_close(self, all_fds=False):
        """backport IOLoop.close to 3.0 from 3.1 (supports fd.close() method)"""
        from zmq.eventloop.minitornado.ioloop import PollIOLoop as mini_loop
        return mini_loop.close.__get__(self)(all_fds)