cricri.py 文件源码

def __new__(mcs, cls_name, bases, attrs, previous=None, start=False):
        if bases and TestServer in bases:

            for attr_name in mcs._class_clients:
                attrs.setdefault(attr_name, [])

            validate_attributes = mcs._build_attributes_validator()
            try:
                attrs = validate_attributes(attrs)

            except Invalid as error:
                msg = "{} @ {}.{}".format(error.error_message,
                                          cls_name, error.path[0])
                msg += ''.join('[{!r}]'.format(element)
                               for element in error.path[1:])

                raise AttributeError(msg)

        return MetaTestState.__new__(mcs, cls_name, bases, attrs, previous,
                                     start)