__init__.py 文件源码

def add_service_type(self, type):
        interface, protocol, domain = (
            self.interface, self.protocol, self.domain)
        # Are we already browsing this domain for this type?
        if self.already_browsing(type):
            return

        logger.info("Browsing for services of type '%s' in domain '%s' on %s.%i ..." %
                    (type, domain, self.siocgifname(interface), protocol))

        browser = self.server.ServiceBrowserNew(
            interface, protocol, type, domain, dbus.UInt32(0))
        bus = dbus.Interface(self.system_bus.get_object(
            avahi.DBUS_NAME, browser), avahi.DBUS_INTERFACE_SERVICE_BROWSER)
        bus.connect_to_signal('ItemNew', self.service_add)
        bus.connect_to_signal('ItemRemove', self.service_remove)

        self.service_browsers[(interface, protocol, type, domain)] = bus