twisted.py 文件源码

def install(io_loop=None):
    """Install this package as the default Twisted reactor.

    ``install()`` must be called very early in the startup process,
    before most other twisted-related imports. Conversely, because it
    initializes the `.IOLoop`, it cannot be called before
    `.fork_processes` or multi-process `~.TCPServer.start`. These
    conflicting requirements make it difficult to use `.TornadoReactor`
    in multi-process mode, and an external process manager such as
    ``supervisord`` is recommended instead.

    .. versionchanged:: 4.1
       The ``io_loop`` argument is deprecated.

    """
    if not io_loop:
        io_loop = tornado.ioloop.IOLoop.current()
    reactor = TornadoReactor(io_loop)
    from twisted.internet.main import installReactor
    installReactor(reactor)
    return reactor