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Clean up and fix email message types (#13532)

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* Unify the `_MessageT` type var in `email._policybase`.
* Use explicit type arguments for `Message` type in `_MessageT` type var.
  In particular, change bound from `Message[str, str]` to `Message[Any, Any]`.
* Change `__init__()` overloads of `Parser` and `BytesParser` to accept
  `Message` objects that are not `Message[str, str]` if `_class` is not also given.
This commit is contained in:
Sebastian Rittau
2025-05-05 17:59:51 +02:00
committed by GitHub
parent a43e0a4c02
commit 0eb44e574c
11 changed files with 42 additions and 25 deletions
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stdlib/@tests/test_cases/email/check_parser.py
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import email.policy
from email.message import EmailMessage, Message
from email.parser import BytesParser, Parser
from typing_extensions import assert_type
p1 = Parser()
p2 = Parser(policy=email.policy.default)
assert_type(p1, Parser[Message[str, str]])
assert_type(p2, Parser[EmailMessage])
bp1 = BytesParser()
bp2 = BytesParser(policy=email.policy.default)
assert_type(bp1, BytesParser[Message[str, str]])
assert_type(bp2, BytesParser[EmailMessage])