New submission from Yves <[email protected]>:
On different platforms and versions the following expression has different
results:
python -c 'import re; print(re.compile("(.*)", 0).sub("a\\1", "bc"))'
As far is I observed:
Linux/Python 3.6.9 => abc
MacOS/Python 3.7.1 => abca
Repl.it/Python 3.8.1 => abca
MacOS/Python 2.7.17 => abc
Linux/Python 2.7.17 => abc
According the the documentation I would guess that "abc" is the correct return
value.
The issues also occurs without compiling or capture group:
re.sub(".*", "a", "cb") a vs aa
----------
components: Regular Expressions
messages: 362264
nosy: ezio.melotti, mrabarnett, slomo
priority: normal
severity: normal
status: open
title: re.sub behaves inconsistent between versions with * repetition qualifier
versions: Python 3.8
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Python tracker <[email protected]>
<https://bugs.python.org/issue39687>
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