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Code Issues Projects Releases Packages Wiki Activity Actions 11

bpo-30349: Raise FutureWarning for nested sets and set operations (#1553)

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in regular expressions.
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Serhiy Storchaka 2017-11-16 12:38:26 +02:00 • committed by GitHub
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@ -700,6 +700,17 @@ Changes in the Python API
argument ``os.scandir`` instead of ``os.listdir`` when listing the direcory
is failed.
* Support of nested sets and set operations in regular expressions as in
`Unicode Technical Standard #18`_ might be added in the future. This would
change the syntax, so to facilitate this change a :exc:`FutureWarning` will
be raised in ambiguous cases for the time being.
That include sets starting with a literal ``'['`` or containing literal
character sequences ``'--'``, ``'&&'``, ``'~~'``, and ``'||'``. To
avoid a warning escape them with a backslash.
(Contributed by Serhiy Storchaka in :issue:`30349`.)
.. _Unicode Technical Standard #18: https://unicode.org/reports/tr18/
Changes in the C API
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