pythondbus:如何导出接口属性

在Python中实现D-Bus属性绝对是可能的!D-Bus属性只是特定接口上的方法,即 org.freedesktop.DBus.Properties . 接口已定义 in the D-Bus specification

# Untested, just off the top of my head

import dbus

MY_INTERFACE = 'com.example.Foo'

class Foo(dbus.service.object):
    # …

    @dbus.service.method(interface=dbus.PROPERTIES_IFACE,
                         in_signature='ss', out_signature='v')
    def Get(self, interface_name, property_name):
        return self.GetAll(interface_name)[property_name]

    @dbus.service.method(interface=dbus.PROPERTIES_IFACE,
                         in_signature='s', out_signature='a{sv}')
    def GetAll(self, interface_name):
        if interface_name == MY_INTERFACE:
            return { 'Blah': self.blah,
                     # …
                   }
        else:
            raise dbus.exceptions.DBusException(
                'com.example.UnknownInterface',
                'The Foo object does not implement the %s interface'
                    % interface_name)

    @dbus.service.method(interface=dbus.PROPERTIES_IFACE,
                         in_signature='ssv'):
    def Set(self, interface_name, property_name, new_value):
        # validate the property name and value, update internal state…
        self.PropertiesChanged(interface_name,
            { property_name: new_value }, [])

    @dbus.service.signal(interface=dbus.PROPERTIES_IFACE,
                         signature='sa{sv}as')
    def PropertiesChanged(self, interface_name, changed_properties,
                          invalidated_properties):
        pass

如果有人想潜进去帮忙修理这样的东西,他们是最受欢迎的。即使在文档中添加此样板文件的扩展版本也只是一个开始,因为这是一个非常常见的问题。如果您感兴趣,可以将补丁发送到 D-Bus mailing list ,或附加到Bug filed against dbus-python on the FreeDesktop bugtracker .

''' 可以通过调用org.freedesktop.DBus网站.内省。内省,请参阅名为org.freedesktop.DBus网站.内省。 '''

我使用dbus-python-1.1.1