Re: How/where to call setlocale

Dear Jay,

I just tried to following in my wsgi.py file:

import os

import sys

import site

import locale

site.addsitedir('/mypath/lib/python3.3/site-packages')

os.environ.setdefault("DJANGO_SETTINGS_MODULE", "test.settings")

os.environ['HTTPS'] = "on"

sys.path.append('/mypath/test')

sys.path.append('/mypath/test/test')

sys.path.append('/mypath/test/app1')

sys.path.append('/mypath/test/app2')

activate_env=os.path.expanduser("/mypath/bin/activate_this.py")

exec(open(activate_env).read())

locale.setlocale(locale.LC_ALL, 'en_US.utf-8')

from django.core.wsgi import get_wsgi_application

application = get_wsgi_application()

This sets the locale correctly for all calls to my Django application. 

I just realized that in your first post you mentioned that "this affects the entire environment". I just read through the locale module documentation, which states that "The C standard defines the locale as a program-wide property ....". This means that there will be no system-wide changes when you call locale.setenv(). Or did I misunderstand you?

Best wishes,

Ulrich 

Am Dienstag, 16. September 2014 22:39:08 UTC+2 schrieb James Hargreaves:

Thanks for your reply Ulrich.

If I set the locale in WSGI would that persist for all connections? If so that sounds like the best option.

Thanks

Jay

On Tuesday, September 16, 2014, <rettev...@googlemail.com> wrote:

Hi, 

I ran into a similar problem yesterday while programming a web shop with Django (Version 1.6, Python version 3.3) where language switching should immediately have an effect on the way prices, etc. are displayed (doing so by a <form action="/i18n/setlang/" method="POST" > in the template and redirecting back to the page where it was called). The locale is indeed not set this way and needs to be set explicitly. What I finally came up with as a first working solution as part of a function:

def convert_my_price(_price)  # _price is a decimal.Decimal

    language = django.utils.translation.get_language()

    if language == 'en':

        locale.setlocale(locale.LC_ALL, 'en_US.utf-8')     # 'en_GB.utf-8'  didn't work for me 

    else:

        locale.setlocale(locale.LC_ALL, 'de_DE.utf-8')    # this is the fallback

    _loc = locale.localeconv() 

    .

    .  # process the Decimal

    .  
    return my_price_as_a_string

After doing so I have access to the locale details stored in the dictionairy _loc, like e.g. _loc['thousands_sep'], _loc['currency_symbol'] in this function, but also everywhere else via locale.localeconv() 

This function however is currently called from within class based views, but also implemented as a template filter. Of course one should not set the locale every time when calling this function, as you mentioned locale.getlocale() will should whether it was correctly set or not.

Where you call locale.setlocale depends on your application. When you only have to set it once maybe the best would be to call it in even in e.g. wsgi.py 

Best regards,

Ulrich

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