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| author | Alex Waygood <Alex.Waygood@Gmail.com> | 2023-06-14 14:58:41 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2023-06-14 14:58:41 (GMT) |
| commit | 7b1f0f204a785485de1daf9d26828a81953537e4 (patch) | |
| tree | 6f11456f04444190aa5b2e3bf1cc5ff41f915575 /Doc/library/typing.rst | |
| parent | d32e8d6070057eb7ad0eb2f9d9f1efab38b2cff4 (diff) | |
| download | cpython-7b1f0f204a785485de1daf9d26828a81953537e4.zip cpython-7b1f0f204a785485de1daf9d26828a81953537e4.tar.gz cpython-7b1f0f204a785485de1daf9d26828a81953537e4.tar.bz2 | |
gh-105570: Deprecate unusual ways of creating empty TypedDicts (#105780)
Deprecate two methods of creating typing.TypedDict classes with 0 fields using the functional syntax: `TD = TypedDict("TD")` and `TD = TypedDict("TD", None)`. Both will be disallowed in Python 3.15. To create a TypedDict class with 0 fields, either use `class TD(TypedDict): pass` or `TD = TypedDict("TD", {})`.
Diffstat (limited to 'Doc/library/typing.rst')
| -rw-r--r-- | Doc/library/typing.rst | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/Doc/library/typing.rst b/Doc/library/typing.rst index 31861a0..73555d5 100644 --- a/Doc/library/typing.rst +++ b/Doc/library/typing.rst @@ -2388,6 +2388,14 @@ These are not used in annotations. They are building blocks for declaring types. .. versionchanged:: 3.13 Removed support for the keyword-argument method of creating ``TypedDict``\ s. + .. deprecated-removed:: 3.13 3.15 + When using the functional syntax to create a TypedDict class, failing to + pass a value to the 'fields' parameter (``TD = TypedDict("TD")``) is + deprecated. Passing ``None`` to the 'fields' parameter + (``TD = TypedDict("TD", None)``) is also deprecated. Both will be + disallowed in Python 3.15. To create a TypedDict class with 0 fields, + use ``class TD(TypedDict): pass`` or ``TD = TypedDict("TD", {})``. + Protocols --------- |