operators.py 文件源码

 复制代码def is_overridden(self, node, name=None):
        if not isinstance(node.parent, ast.ClassDef):
            raise MutationResign()
        if not name:
            name = node.name
        parent = node.parent
        parent_names = []
        while parent:
            if not isinstance(parent, ast.Module):
                parent_names.append(parent.name)
            if not isinstance(parent, ast.ClassDef) and not isinstance(parent, ast.Module):
                raise MutationResign()
            parent = parent.parent
        getattr_rec = lambda obj, attr: functools.reduce(getattr, attr, obj)
        try:
            klass = getattr_rec(self.module, reversed(parent_names))
        except AttributeError:
            raise MutationResign()
        for base_klass in type.mro(klass)[1:-1]:
            if hasattr(base_klass, name):
                return True
        return False