util.py 文件源码

def get_class_that_defined_method(meth):
    """Determines the class owning the given method.
    """
    if is_classmethod(meth):
        return meth.__self__
    if hasattr(meth, 'im_class'):
        return meth.im_class
    elif hasattr(meth, '__qualname__'):
        # Python 3
        try:
            cls_names = meth.__qualname__.split('.<locals>', 1)[0].rsplit('.', 1)[0].split('.')
            cls = inspect.getmodule(meth)
            for cls_name in cls_names:
                cls = getattr(cls, cls_name)
            if isinstance(cls, type):
                return cls
        except AttributeError:
            # If this was called from a decorator and meth is not a method, this
            # can result in AttributeError, because at decorator-time meth has not
            # yet been added to module. If it's really a method, its class would be
            # already in, so no problem in that case.
            pass
    raise ValueError(str(meth)+' is not a method.')