def subscribe(name):
        """
        Subscribe to a mailbox

        @type name: L{bytes}
        @param name: The name of the mailbox to subscribe to

        @rtype: L{Deferred} or L{bool}
        @return: A true value if the mailbox is subscribed to successfully, or
            a Deferred whose callback will be invoked with this value when the
            subscription is successful.

        @raise MailboxException: Raised if this mailbox cannot be subscribed
            to. This may also be raised asynchronously, if a L{Deferred} is
            returned.
        """

        Subscribe to a mailbox

        @type name: L{bytes}
        @param name: The name of the mailbox to subscribe to

        @rtype: L{Deferred} or L{bool}
        @return: A true value if the mailbox is subscribed to successfully, or
            a Deferred whose callback will be invoked with this value when the
            subscription is successful.

        @raise MailboxException: Raised if this mailbox cannot be subscribed
            to. This may also be raised asynchronously, if a L{Deferred} is
            returned.
        
stackoverflow/venv/lib/python3.6/site-packages/twisted/mail/interfaces.py