会报错如下:TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases 如果将test1中的__metaclass__ = ABCMeta去掉就能运行。但是不想去掉,如何在以上基础上解决呢?(程序是在运行时动态决定继承哪些类,继承的类名和数量都不一定...
--->1classC(A, B):2pass3TypeError: metaclassconflict: the metaclassofa derivedclassmustbe a (non-strict) subclassofthe metaclassesofall its bases 如上M0与M1为自定义metaclass,分别作为A、B的metaclass,当class C试图多继承A、B时就会出问题,从字面意思理解:子类的metaclass必须是其所有基类metaclass的(...
如上我们通过手动定义M2,并手动明确指定class C的metaclass为M2,如此解决metaclass conflict问题。 这时再回到开头碰到的多继承abc.ABC与admin.ModelAdmin时遇到的问题就很容易理解了:因为abc.ABC有自己的metaclass abc.ABCMeta,同时modelAdmin也有自己的metaclass django.forms.widgets.MediaDefiningClass,并且这两者之间没有...
TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases 非常舒服地报错了,子类的元类必须和其所有父类的元类都相同或为其子类,不存在歧义的问题。 暂且就是这些。 虽说思而不学则殆,一点点猜不如先查文档,不过实在是懒得...
我遇到一个问题,我想使用 的 mixin 方法collections.abc.MutableSequence,但我还必须从其他方法继承。 class Thing(urwid.Pile, collections.abc.MutableSequence): ... Run Code Online (Sandbox Code Playgroud) 我最终得到 TypeError: metaclass conflict: the metaclass of a derived class must be a (non-str...
TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases Standalone code to reproduce the issue I have explain everything above Relevant log output No response
TypeError: metaclass conflict: the metaclass of a derived 例外并不总是会出现,我发现很难跟踪问题实际发生的地方,因为后来它神秘地消失了。 问题来自 resource.py 在django-framework中,功能 filter_response(): return self.serialize(obj) 谁能告诉我为什么发生此错误? 看答案 几周后,这个问题再次发生。我之...
return_annotation, ClassFromFunctionBase): # type: ignore TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its basesSame if I use the newly introduced Self:from jsonargparse import class_from_function from typing_...
TypeError:metaclass conflict:the metaclass of a derivedclassmust be a(non-strict)subclass of the metaclasses of all its bases The correct answer (see the book "Putting metaclasses to work" for a thoughtful discussion) isM_C, whereM_Cis a metaclass that inherits fromM_AandM_B, as in the ...
metaclass conflict: the metaclass of aderived class must be a (non-strict) subclass of the metaclasses of all its bases 意思很明显,子类的__metaclass__必须继承自基类的__metaclass__,那么再改改 1classDummyMetaIMixin(MetaMixin):2def__init__(cls, name, bases, dic):3type.__init__(cls, ...