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Diffstat (limited to 'Doc')
| -rw-r--r-- | Doc/whatsnew/3.8.rst | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Doc/whatsnew/3.8.rst b/Doc/whatsnew/3.8.rst index bf8d8f1..0360be6 100644 --- a/Doc/whatsnew/3.8.rst +++ b/Doc/whatsnew/3.8.rst @@ -442,6 +442,13 @@ Changes in Python behavior in the leftmost :keyword:`!for` clause). (Contributed by Serhiy Storchaka in :issue:`10544`.) +* The compiler now produces a :exc:`SyntaxWarning` when identity checks + (``is`` and ``is not``) are used with certain types of literals + (e.g. strings, ints). These can often work by accident in CPython, + but are not guaranteed by the language spec. The warning advises users + to use equality tests (``==`` and ``!=``) instead. + (Contributed by Serhiy Storchaka in :issue:`34850`.) + Changes in the Python API ------------------------- |