asyncio.py 文件源码

def initialize(self, asyncio_loop, close_loop=False, **kwargs):
        super(BaseAsyncIOLoop, self).initialize(**kwargs)
        self.asyncio_loop = asyncio_loop
        self.close_loop = close_loop
        # Maps fd to (fileobj, handler function) pair (as in IOLoop.add_handler)
        self.handlers = {}
        # Set of fds listening for reads/writes
        self.readers = set()
        self.writers = set()
        self.closing = False