import typing as t import warnings class UserAgentMixin: def __init__(self, *args: t.Any, **kwargs: t.Any) -> None: warnings.warn( "'UserAgentMixin' is deprecated and will be removed in" " Werkzeug 2.1. 'Request' now includes the functionality" " directly.", DeprecationWarning, stacklevel=2, ) super().__init__(*args, **kwargs)