Add the __enter__ and __exit__ methods to Session.

[howbazaar]

As per https://github.com/sqlalchemy/sqlalchemy/blame/958f902b1fc528fed0be550bc573545de47ed854/lib/sqlalchemy/orm/session.py#L1131 the Session object has had __enter__ and __exit__ for about 17 months.

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[mrtolkien]

Any update on that issue? I'm trying to use mypy + pydantic + sqlalchemy in a project and needing to write # type: ignore on every single session opening is quite problematic.

[Kfelts]

Any update on that issue? I'm trying to use mypy + pydantic + sqlalchemy in a project and needing to write # type: ignore on every single session opening is quite problematic.

I'm here for the same reason. It's been almost a year since this was submitted.