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bpo-46659: calendar uses locale.getlocale()#31166

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vstinner merged 2 commits into
python:mainfrom
vstinner:calendar_defaultlocale
Feb 7, 2022
Merged

bpo-46659: calendar uses locale.getlocale()#31166
vstinner merged 2 commits into
python:mainfrom
vstinner:calendar_defaultlocale

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@vstinner

@vstinner vstinner commented Feb 6, 2022 •
edited by bedevere-bot
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The calendar.LocaleTextCalendar and calendar.LocaleHTMLCalendar
classes module now use locale.getlocale(), instead of using
locale.getdefaultlocale(), if no locale is specified.

https://bugs.python.org/issue46659

@vstinner
bpo-46659: calendar uses locale.getlocale() …
74ca535 
The calendar.LocaleTextCalendar and calendar.LocaleHTMLCalendar
classes module now use locale.getlocale(), instead of using
locale.getdefaultlocale(), if no locale is specified.
@vstinner

vstinner commented Feb 6, 2022

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cc @serhiy-storchaka @malemburg @methane

@vstinner

vstinner commented Feb 6, 2022 •
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Example with cal_locale.py attached to bpo-46659. Run the program in English, but switch to a french locale before creating the LocaleTextCalendar() instance.

Current behavior: calendar speaks English, even if the current LC_TIME locale is French:

$ LC_ALL=en_US.utf8 ./python cal_locale.py fr_FR.utf8
locale.getlocale()=('fr_FR', 'UTF-8')
locale.getdefaultlocale()=('en_US', 'UTF-8')
cal.locale=('en_US', 'UTF-8')
                                August 2022
  Monday    Tuesday   Wednesday   Thursday    Friday    Saturday    Sunday
     1          2          3          4          5          6          7
     8          9         10         11         12         13         14
    15         16         17         18         19         20         21
    22         23         24         25         26         27         28
    29         30         31

With this PR: calendar speaks French:

$ LC_ALL=en_US.utf8 ./python cal_locale.py fr_FR.utf8
locale.getlocale()=('fr_FR', 'UTF-8')
locale.getdefaultlocale()=('en_US', 'UTF-8')
cal.locale=('fr_FR', 'UTF-8')
                                 août 2022
  lundi      mardi     mercredi    jeudi     vendredi    samedi    dimanche
     1          2          3          4          5          6          7
     8          9         10         11         12         13         14
    15         16         17         18         19         20         21
    22         23         24         25         26         27         28
    29         30         31

Applications which don't call setlocale() to change the LC_ALL or LC_TIME locale are not affected.

@serhiy-storchaka

serhiy-storchaka commented Feb 7, 2022

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Would not be more correct to use locale.getlocale(locale.LC_TIME)?

@vstinner

vstinner commented Feb 7, 2022

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With this PR, the two classes store the current locale when an instance is created. Is it really an important feature?

Or would it be acceptable to use the current locale (don't change the locale) if locale=None is passed (default behavior)?

@vstinner

vstinner commented Feb 7, 2022

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Would not be more correct to use locale.getlocale(locale.LC_TIME)?

You're right: done.

@vstinner vstinner merged commit 7a0486e into python:main Feb 7, 2022
@vstinner vstinner deleted the calendar_defaultlocale branch February 7, 2022 23:24
@vstinner

vstinner commented Feb 7, 2022

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Merged, thanks for your reviews.

With this PR, the two classes store the current locale when an instance is created. Is it really an important feature?

In case of doubt, I prefer to leave the code as it is.

@vstinner vstinner mentioned this pull request Dec 11, 2022
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@vstinner @serhiy-storchaka @methane @the-knights-who-say-ni @bedevere-bot