mixins.py 文件源码

def _holder_frame(self):
        # TODO: detect base class by scanning inheritance tree:
        # inspect.getclasstree(inspect.getmro(type(self)))
        frame = inspect.currentframe().f_back.f_back.f_back
        while isinstance(frame.f_locals.get('self', ''), self.base_class):
            frame = frame.f_back
        return frame