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re.split doesn't respect MULTILINE #59741

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re.split doesn't respect MULTILINE#59741
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topic-regextype-bugAn unexpected behavior, bug, or error

Description

@dabrahams
dabrahams
mannequin
opened on Aug 2, 2012
BPO 15536
Nosy @ezio-melotti, @dabrahams, @serhiy-storchaka
Superseder
  • bpo-15537: MULTILINE confuses re.split
    		•

    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 2012-08-04.21:07:14.545>
created_at = <Date 2012-08-02.14:41:18.477>
labels = ['expert-regex', 'type-bug']
title = "re.split doesn't respect MULTILINE"
updated_at = <Date 2012-08-04.21:07:14.545>
user = 'https://github.com/dabrahams'

    bugs.python.org fields:

    activity = <Date 2012-08-04.21:07:14.545>
actor = 'r.david.murray'
assignee = 'none'
closed = True
closed_date = <Date 2012-08-04.21:07:14.545>
closer = 'r.david.murray'
components = ['Regular Expressions']
creation = <Date 2012-08-02.14:41:18.477>
creator = 'dabrahams'
dependencies = []
files = []
hgrepos = []
issue_num = 15536
keywords = []
message_count = 2.0
messages = ['167224', '167241']
nosy_count = 4.0
nosy_names = ['ezio.melotti', 'mrabarnett', 'dabrahams', 'serhiy.storchaka']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = 'resolved'
status = 'closed'
superseder = '15537'
type = 'behavior'
url = 'https://bugs.python.org/issue15536'
versions = ['Python 2.7']

    Activity

    1. dabrahams commented on Aug 2, 2012

      @dabrahams
      dabrahamsmannequin
      on Aug 2, 2012
      MannequinAuthor

      This session demonstrates. See especially the very last expression evaluated

      >>> s='''this is the end
s='''this is the end
... your only friend
your only friend
... the end'''
the end'''
>>> re.split('^', s, re.MULTILINE)
re.split('^', s, re.MULTILINE)
['this is the end\nyour only friend\nthe end']
>>> re.split('t', s, re.MULTILINE)
re.split('t', s, re.MULTILINE)
['', 'his is ', 'he end\nyour only friend\n', 'he end']
>>> re.split('\n', s, re.MULTILINE)
re.split('\n', s, re.MULTILINE)
['this is the end', 'your only friend', 'the end']
>>> re.split('(?<=\n)', s, re.MULTILINE)
re.split('(?<=\n)', s, re.MULTILINE)
['this is the end\nyour only friend\nthe end']
>>> re.split('^y', s, re.MULTILINE)
re.split('^y', s, re.MULTILINE)
['this is the end\nyour only friend\nthe end']
>>> re.split('$', s, re.MULTILINE)
re.split('$', s, re.MULTILINE)
['this is the end\nyour only friend\nthe end']
>>> re.split('$\n', s, re.MULTILINE)
re.split('$\n', s, re.MULTILINE)
['this is the end\nyour only friend\nthe end']
>>> re.split('\n', s, re.MULTILINE)
re.split('\n', s, re.MULTILINE)
['this is the end', 'your only friend', 'the end']
>>> re.split('^t', s, re.MULTILINE)
re.split('^t', s, re.MULTILINE)
['', 'his is the end\nyour only friend\nthe end']
>>> re.split('^t', s)
re.split('^t', s)
['', 'his is the end\nyour only friend\nthe end']
>>>
    2. dabrahams
      added
      topic-regex
      type-bugAn unexpected behavior, bug, or error
      on Aug 2, 2012

    3. serhiy-storchaka commented on Aug 2, 2012

      @serhiy-storchaka
      serhiy-storchaka
      on Aug 2, 2012
      Member

      Same as for bpo-15537.

    4. bitdancer
      closed this as completedon Aug 4, 2012
    5. ezio-melotti
      transferred this issue fromon Apr 10, 2022
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