index (original ) (raw )
classification
process
Created on 2016-06-01 14:20 by jdemeyer , last changed 2022-04-11 14:58 by admin . This issue is now closed .
Messages (9)
msg266817 - (view) Author: Jeroen Demeyer (jdemeyer) *
Date: 2016-06-01 14:20
``` >>> class zero(object): ... def __index__(self): ... return 0 ... >>> z = zero() >>> import re >>> p = re.compile('(a)b') >>> m = p.match('ab') >>> m.group(0) 'ab' >>> m.group(z) Traceback (most recent call last): File "", line 1, in IndexError: no such group ```
msg266822 - (view) Author: Serhiy Storchaka (serhiy.storchaka) *
Date: 2016-06-01 16:35
This looks as new feature and can go only in 3.6.
msg266884 - (view) Author: Jeroen Demeyer (jdemeyer) *
Date: 2016-06-02 12:35
I would still argue that it's a bug. The intention of PEP 357 is that __index__ should be used whenever some object needs to be converted to a Py_ssize_t, which is exactly what you do here.
msg266885 - (view) Author: Matthew Barnett (mrabarnett) *
Date: 2016-06-02 14:00
It would be a bug if it was supported but gave the wrong result. It has never been supported (the re module predates PEP 357 ), so it's a new feature.
msg268606 - (view) Author: Xiang Zhang (xiang.zhang) *
Date: 2016-06-15 07:02
Attach a patch to add this feature to Py3.6.
msg268775 - (view) Author: Serhiy Storchaka (serhiy.storchaka) *
Date: 2016-06-18 07:37
What is the use case?
msg268797 - (view) Author: Jeroen Demeyer (jdemeyer) *
Date: 2016-06-18 11:40
My use case is SageMath: http://trac.sagemath.org/ticket/20750
msg268800 - (view) Author: Serhiy Storchaka (serhiy.storchaka) *
Date: 2016-06-18 13:06
Interesting. This is very unusual but reasonable use case.
msg268804 - (view) Author: Roundup Robot (python-dev)
Date: 2016-06-18 13:48
New changeset 0303ab246152 by Serhiy Storchaka in branch 'default': Issue #27177 : Match objects in the re module now support index-like objects https://hg.python.org/cpython/rev/0303ab246152
History
Date
User
Action
Args
2022-04-11 14:58:31
admin
set
github: 71364
2016-06-18 14:13:40
serhiy.storchaka
set
status: open -> closedresolution: fixedstage: needs patch -> resolved
2016-06-18 13:48:29
python-dev
set
nosy: + python-dev messages: +
2016-06-18 13:06:55
serhiy.storchaka
set
assignee: serhiy.storchaka messages: +
2016-06-18 11:40:28
jdemeyer
set
messages: +
2016-06-18 07:37:37
serhiy.storchaka
set
messages: +
2016-06-15 07:02:13
xiang.zhang
set
files: + issue27177.patch nosy: + xiang.zhang messages: +
2016-06-02 14:00:55
mrabarnett
set
messages: +
2016-06-02 12:35:59
jdemeyer
set
messages: +
2016-06-01 16:35:13
serhiy.storchaka
set
versions: + Python 3.6, - Python 2.7nosy: + serhiy.storchaka messages: + type: enhancementstage: needs patch
2016-06-01 14:20:08
jdemeyer
create
This issue has been migrated to GitHub: https://github.com/python/cpython/issues/71364 
