如何在python中创建一个从QObject派生的抽象基类

Question

I'm trying to create an abstract base class for an interface, but I need it to derive from QObject for signals and slots. My class definition looks like this:

import abc
from PyQt5.QtCore import QObject

class interface_class(abc.ABC, QObject):
    pass

It fails with:

TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases

Any ideas?

thanks

Answer 1

Based on Multiple inheritance metaclass conflict

Try

import abc
from PyQt5.QtCore import QObject, pyqtWrapperType

class FinalMeta(pyqtWrapperType, abc.ABCMeta):
    pass

class interface_class(QObject, metaclass=FinalMeta):
    pass