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re.sub does only first 16 replacements if re.S is used #66949
Description
| BPO | 22760 |
|---|---|
| Nosy | @birkenfeld, @vstinner, @ezio-melotti, @serhiy-storchaka |
| Superseder |
Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.
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GitHub fields:
assignee = None
closed_at = <Date 2014-10-29.15:51:11.671>
created_at = <Date 2014-10-29.15:35:07.080>
labels = ['expert-regex', 'type-bug']
title = 're.sub does only first 16 replacements if re.S is used'
updated_at = <Date 2014-10-29.16:09:48.499>
user = 'https://bugs.python.org/mgdelmonte'bugs.python.org fields:
activity = <Date 2014-10-29.16:09:48.499>
actor = 'vstinner'
assignee = 'none'
closed = True
closed_date = <Date 2014-10-29.15:51:11.671>
closer = 'georg.brandl'
components = ['Regular Expressions']
creation = <Date 2014-10-29.15:35:07.080>
creator = 'mgdelmonte'
dependencies = []
files = []
hgrepos = []
issue_num = 22760
keywords = []
message_count = 5.0
messages = ['230216', '230217', '230218', '230219', '230220']
nosy_count = 7.0
nosy_names = ['georg.brandl', 'peter.otten', 'vstinner', 'ezio.melotti', 'mrabarnett', 'serhiy.storchaka', 'mgdelmonte']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = None
status = 'closed'
superseder = '11957'
type = 'behavior'
url = 'https://bugs.python.org/issue22760'
versions = ['Python 2.7']
Activity
mgdelmonte commentedon Oct 29, 2014
Easily reproduced:
returns 'aaaaaaaaaaaaaaaaxxxx'
peterotten commentedon Oct 29, 2014
This is not a bug; the signature of re.sub() is
and the fourth argument thus the 'count' delimiting the number of substitutions that you accidentally specify as
>>> import re >>> re.S 16I recommend that you use a keyword arg to fix your code:
birkenfeld commentedon Oct 29, 2014
The fourth parameter is not "flags", but "count", the max. number of substitutions. "flags" is the fifth parameter, or give it as a keyword argument.
vstinner commentedon Oct 29, 2014
This bug report is common. An enhancement would be to make the count parameter a keyword only parameter. Would it break a lot of code?
ezio-melotti commentedon Oct 29, 2014
See bpo-11957.