PyGObject，dbus python和元类

Question

我想继承两个python类：一个来自PyGObject，另一个来自python3-dbus：

import gi
from gi.repository import GObject
import dbus.service

class Test(GObject.Object, dbus.service.Object):
    pass

但是我收到以下错误：

$ python3 test.py
Traceback (most recent call last):
    File ".../test.py", line 5, in <module>
       class Test(GObject.Object, dbus.service.Object):
TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases

我已经发现这是因为GObject.Object和dbus.service.Object有不同的元类，我也需要做它们的子类化：

class M_Test(gi.types.GObjectMeta, dbus.service.InterfaceType):
    pass

class Test(GObject.Object, dbus.service.Object):
    __metaclass__=M_Test
    pass

但是它没有帮助，我继续收到同样的错误。也许gi.types.GObjectMeta和dbus.service.InterfaceType不是GObject.Object和dbus.service.Object的正确元类。有谁知道怎么做GObject.Object和dbus.service.Object的合并元类？

Answer 1

Python3更改了指定元类的语法。 PEP-3115

现在是class Test(GObject.Object, dbus.service.Object, metaclass=M_Test):。