Remove deprecated implicit empty sequence argument for `typing.TypedDict`

[picnixz]

Feature or enhancement

Proposal:

It was deprecated in 3.13 but there was no removal notice in the docs: see #105570 and #105780. I don't know whether it's better to delay it a bit more just to have a deprecation notice or to first add a deprecation notice for 3.13 and 3.14, but still remove it in 3.15.

cc @AlexWaygood

Has this already been discussed elsewhere?

This is a minor feature, which does not need previous discussion elsewhere

Links to previous discussion of this feature:

No response

Linked PRs

• gh-133823: require explicit empty sequence for 0-field TypedDict objects #133863
• gh-133823: update "Pending Removal in 3.15" notes about TypedDict #133864
• [3.14] gh-133823: update "Pending Removal in 3.15" notes about TypedDict (GH-133864) #133870
• [3.13] gh-133823: update "Pending Removal in 3.15" notes about TypedDict (GH-133864) #133871

[AlexWaygood]

there was no removal notice in the docs

What do you mean exactly? #105780 added detailed deprecation notes to the API reference for typing.TypedDict and to "What's new in Python 3.13". It also included a NEWS entry noting the deprecation, and added DeprecationWarnings at runtime.

[picnixz]

I meant in the pending deprecation section (which had the other removal notices)

[AlexWaygood]

I see. Personally I think we've given enough notice for this removal in enough places, but I also don't mind if you want to add some notes there too and extend the deprecation period. It's not a huge maintenance burden for that code to hang around for a bit longer.

[picnixz]

How about this:

• Add entries in the "pending deprecation" section for 3.13 and 3.14
• Go with the removal for 3.15.

I just wanted to be sure it was fine on your side as you're a codeowner of typing.py. I also feel it's a bit weird that we don't remove the TypedDict kw syntax but remove the NamedTuple kw syntax so I'm all for the removal in 3.15 (it simplifies the code quite a lot)

[AlexWaygood]

Yeah that plan sounds fine by me! I don't think the syntax that was deprecated was widely used at all, and I think the pending removal was pretty well signalled

[JelleZijlstra]

I'm also fine with getting rid of this (and the NamedTuple equivalent) now.

[picnixz]

See #133822 for the NamedTuple equivalent. I'll do the TypedDict one tomorrow.