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Created on 2019-04-07 10:28 by serhiy.storchaka, last changed 2022-04-11 14:59 by admin. This issue is now closed.
| Pull Requests | |||
|---|---|---|---|
| URL | Status | Linked | Edit |
| PR 12715 | merged | serhiy.storchaka, 2019-04-07 10:31 | |
| Messages (2) | |||
|---|---|---|---|
| msg339567 - (view) | Author: Serhiy Storchaka (serhiy.storchaka) *  |
Date: 2019-04-07 10:28 | |
Currently the repr of re flags contains the name of the private class and it is not an evaluable expression:
>>> re.I
<RegexFlag.IGNORECASE: 2>
>>> re.I|re.S|re.X
<RegexFlag.VERBOSE|DOTALL|IGNORECASE: 82>
The repr of inverted flags is even more verbose:
<RegexFlag.ASCII|DEBUG|VERBOSE|UNICODE|DOTALL|MULTILINE|LOCALE|TEMPLATE: -3>
>>> ~(re.I|re.S|re.X)
<RegexFlag.ASCII|DEBUG|UNICODE|MULTILINE|LOCALE|TEMPLATE: -83>
The result of str() starves from the same issues.
>>> print(re.I)
RegexFlag.IGNORECASE
>>> print(re.I|re.S|re.X)
RegexFlag.VERBOSE|DOTALL|IGNORECASE
>>> print(~re.I)
RegexFlag.ASCII|DEBUG|VERBOSE|UNICODE|DOTALL|MULTILINE|LOCALE|TEMPLATE
>>> print(~(re.I|re.S|re.X))
RegexFlag.ASCII|DEBUG|UNICODE|MULTILINE|LOCALE|TEMPLATE
If the value contains unrecognized flags, it looks even more weird, and this information is not shown for invered flags:
>>> re.I|re.S|re.X|(1<<10)
<RegexFlag.1024|VERBOSE|DOTALL|IGNORECASE: 1106>
>>> ~(re.I|re.S|re.X|(1<<10))
<RegexFlag.ASCII|DEBUG|UNICODE|MULTILINE|LOCALE|TEMPLATE: -1107>
>>> print(re.I|re.S|re.X|(1<<10))
RegexFlag.1024|VERBOSE|DOTALL|IGNORECASE
>>> print(~(re.I|re.S|re.X|(1<<10)))
RegexFlag.ASCII|DEBUG|UNICODE|MULTILINE|LOCALE|TEMPLATE
This repr is also not consistent with the represenation of flags in the repr of the compiled pattern:
>>> re.compile('x', re.I|re.S|re.X)
re.compile('x', re.IGNORECASE|re.DOTALL|re.VERBOSE)
The proposed PR makes the repr be the same as for flags in the repr of the compiled pattern and represents inverted flags as the result of inversion:
>>> re.I
re.IGNORECASE
>>> re.I|re.S|re.X
re.IGNORECASE|re.DOTALL|re.VERBOSE
>>> ~re.I
~re.IGNORECASE
>>> ~(re.I|re.S|re.X)
~(re.IGNORECASE|re.DOTALL|re.VERBOSE)
>>> re.I|re.S|re.X|(1<<10)
re.IGNORECASE|re.DOTALL|re.VERBOSE|0x400
>>> ~(re.I|re.S|re.X|(1<<10))
~(re.IGNORECASE|re.DOTALL|re.VERBOSE|0x400)
__str__ is set to object.__str__, so that str() will return the same as repr().
|
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| msg344031 - (view) | Author: Serhiy Storchaka (serhiy.storchaka) * |
Date: 2019-05-31 07:39 | |
New changeset 14a0e16c8805f7ba7c98132ead815dcfdf0e9d33 by Serhiy Storchaka in branch 'master': bpo-36548: Improve the repr of re flags. (GH-12715) https://github.com/python/cpython/commit/14a0e16c8805f7ba7c98132ead815dcfdf0e9d33 |
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