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| author | Ken Jin <28750310+Fidget-Spinner@users.noreply.github.com> | 2021-04-27 14:31:04 (GMT) |
|---|---|---|
| committer | GitHub <noreply@github.com> | 2021-04-27 14:31:04 (GMT) |
| commit | 05ab4b60ab3dae61ee75692b6624537d4f3fdf85 (patch) | |
| tree | ca79d746064f5c352b712b5bc66d8c0322d51e84 /Doc/whatsnew | |
| parent | d92513390a1a0da781bb08c284136f4d7abea36d (diff) | |
| download | cpython-05ab4b60ab3dae61ee75692b6624537d4f3fdf85.zip cpython-05ab4b60ab3dae61ee75692b6624537d4f3fdf85.tar.gz cpython-05ab4b60ab3dae61ee75692b6624537d4f3fdf85.tar.bz2 | |
bpo-43766: Implement PEP 647 (User-Defined Type Guards) in typing.py (#25282)
Diffstat (limited to 'Doc/whatsnew')
| -rw-r--r-- | Doc/whatsnew/3.10.rst | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Doc/whatsnew/3.10.rst b/Doc/whatsnew/3.10.rst index 91ad8ec..eeb0c29 100644 --- a/Doc/whatsnew/3.10.rst +++ b/Doc/whatsnew/3.10.rst @@ -743,6 +743,16 @@ See :pep:`613` for more details. (Contributed by Mikhail Golubev in :issue:`41923`.) +PEP 647: User-Defined Type Guards +--------------------------------- + +:data:`TypeGuard` has been added to the :mod:`typing` module to annotate +type guard functions and improve information provided to static type checkers +during type narrowing. For more information, please see :data:`TypeGuard`\ 's +documentation, and :pep:`647`. + +(Contributed by Ken Jin and Guido van Rossum in :issue:`43766`. +PEP written by Eric Traut.) Other Language Changes ====================== |