telnet.py 文件源码

def will(option):
        """Indicate our willingness to begin performing this option locally.

        Returns a Deferred that fires with True when the peer agrees to allow
        us to begin performing this option, or False if the peer refuses to
        allow us to begin performing it.  If the option is already enabled
        locally, the Deferred will fail with L{AlreadyEnabled}.  If negotiation
        regarding this option is already in progress, the Deferred will fail with
        L{AlreadyNegotiating}.

        Note: It is currently possible that this Deferred will never fire,
        if the peer never responds, or if the peer believes the option to
        already be enabled.
        """