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Named group regex error #51557

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pythonmeister mannequin opened this issue Nov 11, 2009 · 2 comments
Closed

Named group regex error #51557

pythonmeister mannequin opened this issue Nov 11, 2009 · 2 comments
Labels
interpreter-core (Objects, Python, Grammar, and Parser dirs) stdlib Python modules in the Lib dir type-bug An unexpected behavior, bug, or error

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@pythonmeister
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Mannequin

pythonmeister mannequin commented Nov 11, 2009

BPO 7308
Nosy @mdickinson

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 2009-11-11.21:54:02.187>
created_at = <Date 2009-11-11.21:49:20.502>
labels = ['interpreter-core', 'invalid', 'type-bug', 'library']
title = 'Named group regex error'
updated_at = <Date 2009-11-11.21:54:02.177>
user = 'https://bugs.python.org/pythonmeister'

bugs.python.org fields:

activity = <Date 2009-11-11.21:54:02.177>
actor = 'mark.dickinson'
assignee = 'none'
closed = True
closed_date = <Date 2009-11-11.21:54:02.187>
closer = 'mark.dickinson'
components = ['Interpreter Core', 'Library (Lib)']
creation = <Date 2009-11-11.21:49:20.502>
creator = 'pythonmeister'
dependencies = []
files = []
hgrepos = []
issue_num = 7308
keywords = []
message_count = 2.0
messages = ['95152', '95153']
nosy_count = 2.0
nosy_names = ['mark.dickinson', 'pythonmeister']
pr_nums = []
priority = 'normal'
resolution = 'not a bug'
stage = None
status = 'closed'
superseder = None
type = 'behavior'
url = 'https://bugs.python.org/issue7308'
versions = ['Python 2.6']
@pythonmeister
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Mannequin Author

pythonmeister mannequin commented Nov 11, 2009 

>>> import re
>>> p = re.compile(r'(P?<quotedstring>("[^"]*"))')
>>> p.match('"Hallo"')
>>> p = re.compile(r'("[^"]*")')
>>> p.match('"Hallo"')
<_sre.SRE_Match object at 0x0197F758>
>>> p.match('"Hallo"').group()
'"Hallo"'
>>> import sys
>>> sys.version
'2.6.3 (r263:75183, Oct  5 2009, 14:41:55) [MSC v.1500 32 bit (Intel)]'

When I use a named group like above, the regex does not match.
It otherwise does.
I could not find a hint in the docs, so I guess this behaviour is
not intended.

@pythonmeister pythonmeister mannequin added interpreter-core (Objects, Python, Grammar, and Parser dirs) stdlib Python modules in the Lib dir type-bug An unexpected behavior, bug, or error labels Nov 11, 2009
@mdickinson
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I think you want '(?P...', not '(P?...'.

Python 2.6.3 (r263:75183, Oct 16 2009, 15:14:21) 
[GCC 4.0.1 (Apple Inc. build 5493)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import re
>>> p = re.compile(r'(?P<quotedstring>("[^"]*"))')
>>> p.match('"Hallo"')
<_sre.SRE_Match object at 0x8a3c8>

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