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str.split bug when using sep = None and maxsplit #45581

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QuantumTim mannequin opened this issue Oct 5, 2007 · 4 comments
Closed

str.split bug when using sep = None and maxsplit #45581

QuantumTim mannequin opened this issue Oct 5, 2007 · 4 comments
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type-bug An unexpected behavior, bug, or error

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@QuantumTim
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Mannequin

QuantumTim mannequin commented Oct 5, 2007

BPO 1240
Nosy @gvanrossum, @brettcannon
Superseder
  • bpo-1123: split(None, maxsplit) does not strip whitespace correctly
    		•

    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 2007-10-07.20:06:03.034>
created_at = <Date 2007-10-05.13:20:23.067>
labels = ['type-bug']
title = 'str.split bug when using sep = None and maxsplit'
updated_at = <Date 2007-10-07.20:06:03.033>
user = 'https://bugs.python.org/QuantumTim'

    bugs.python.org fields:

    activity = <Date 2007-10-07.20:06:03.033>
actor = 'brett.cannon'
assignee = 'none'
closed = True
closed_date = <Date 2007-10-07.20:06:03.034>
closer = 'brett.cannon'
components = []
creation = <Date 2007-10-05.13:20:23.067>
creator = 'QuantumTim'
dependencies = []
files = []
hgrepos = []
issue_num = 1240
keywords = []
message_count = 4.0
messages = ['56237', '56242', '56254', '56258']
nosy_count = 3.0
nosy_names = ['gvanrossum', 'brett.cannon', 'QuantumTim']
pr_nums = []
priority = 'normal'
resolution = 'duplicate'
stage = None
status = 'closed'
superseder = '1123'
type = 'behavior'
url = 'https://bugs.python.org/issue1240'
versions = ['Python 2.5', 'Python 2.4']
    @QuantumTim
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    QuantumTim mannequin commented Oct 5, 2007

    From the docs for str.split:
    "If sep is not specified or is None... First, whitespace characters are
    stripped from both ends. Then, words are separated by arbitrary length
    strings of whitespace characters."

    However, ' a b c '.split(None, 1) returns ['a', 'b c '] indicating that
    the "stripped from both ends" isn't taking place, but that it's
    removing whitespace as it goes and never gets to the end as it stops
    parsing when it hits the first split.

    Note this is easily worked around by calling str.strip().split(None,
    1), but it would be good not to have to.

    I've tested this on windows version 2.5, and 2.4.4 for Debian

    @QuantumTim QuantumTim mannequin added the type-bug An unexpected behavior, bug, or error label Oct 5, 2007
    @QuantumTim QuantumTim mannequin changed the title str.split possible bug str.split bug Oct 5, 2007
    @QuantumTim QuantumTim mannequin changed the title str.split bug str.split bug when using sep = None and maxsplit Oct 5, 2007
    @brettcannon
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    I know there is another filed bug on this topic, I just need to find it.

    @gvanrossum
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    It was deemed a documentation bug.

    @brettcannon
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    bpo-1123 was the issue I was thinking of. Setting that as a superceder
    as 1123 was closed prematurely.

    @ezio-melotti ezio-melotti transferred this issue from another repository Apr 10, 2022
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