2 from email.policy import Policy
3 from typing import Optional, Tuple, Union
5 _ParamsType = Union[str, None, Tuple[str, Optional[str], str]]
7 class MIMEBase(email.message.Message):
8 def __init__(self, _maintype: str, _subtype: str, *, policy: Policy | None = ..., **_params: _ParamsType) -> None: ...