i18n and l10n support for Flask based on Babel and pytz

Flask Babel - 0.11.1 Implements i18n and l10n support for Flask. This is based on the Python babel module as well as pytz both of which are installed automatically for you if you install this library. Documention

Information

Category: Python / Learning Tutorial
Watchers: 14
Star: 386
Fork: 152
Last update: Aug 2, 2022

Resource links

http://www.pythondoc.com/flask-babel/index.html

https://github.com/python-babel/flask-babel

Flask Babel - 1.0.0

Implements i18n and l10n support for Flask. This is based on the Python babel module as well as pytz both of which are installed automatically for you if you install this library.

Documention

The latest documentation is available here.

Changelog

v1.0.0 - 06/02/2020

Starting with version 1, flask-babel has changed to Semantic Versioning.

Changed

pytz is an explicit dependency. (#14)
pytz.gae, used for Google App Engine, is no longer necessary and has been removed. (#153)
Fixed a deprecated werkzeug import (#158).
Fix issues switching locales in threaded contexts (#125).

24 Open More issues

Closed

Support temporary language switch inside a request

It would be nice to be able to stash the current language somewhere and use another one for a while during a request execution.

The main use-case I see is sending out emails with Flask-Email. The email should be translated according to the recipient's language and not the current user's language.

Something like:

from flaskext.babel import stash, unstash

# do stuff with current user's language
print _('foo')
# Now switch to th recipient language
stash(new_lang=recipient.language)
send email with i18n tags
unstash()
# Now the language is back to the current user's lang

Well the API is terrible, but you get the idea..

opened Aug 26, 2010 by rslinckx 14

Closed

do not hardcode the translations folder path

This allows to specify in which folder the translations should be looked for instead of having it hardcoded (still defaults to "translations"). This is done either via a folder param passed to the constructor or via the BABEL_TRANSLATIONS_FOLDER configuration variable.

opened Feb 21, 2012 by mdeous 13

Closed

pybabel fails to update under python-3.3

TypeError is being thrown:

$ pybabel update -i messages.pot -d translations/
updating catalog 'translations/en/LC_MESSAGES/messages.po' based on 'messages.pot'
Traceback (most recent call last):
  File "/home/georg/env/main/bin/pybabel", line 9, in <module>
    load_entry_point('Babel==1.3', 'console_scripts', 'pybabel')()
  File "/home/georg/env/main/lib/python3.3/site-packages/babel/messages/frontend.py", line 1151, in main
    return CommandLineInterface().run(sys.argv)
  File "/home/georg/env/main/lib/python3.3/site-packages/babel/messages/frontend.py", line 665, in run
    return getattr(self, cmdname)(args[1:])
  File "/home/georg/env/main/lib/python3.3/site-packages/babel/messages/frontend.py", line 1130, in update
    width=options.width)
  File "/home/georg/env/main/lib/python3.3/site-packages/babel/messages/pofile.py", line 444, in write_po
    _write(comment_header + u'\n')
  File "/home/georg/env/main/lib/python3.3/site-packages/babel/messages/pofile.py", line 388, in _write
    fileobj.write(text)
TypeError: must be str, not bytes

opened Nov 23, 2013 by georgthegreat 12

Closed

Documentation request - using templates

There should be a short introduction in how to use gettext, trans etc in Jinja the jkji2 templates - it's not obvious from the docs that the jinja2 i18n ext is used and that the user does not need to configure this separately.

opened Aug 4, 2010 by danjac 9

Closed

Fix locale selection in multi-threaded Flask app when force_locale is used

This fixes issue #117 by setting babel_locale in force_locale context manager instead of replacing locale getter. Babel extension instance is shared across threads (through Flask.extensions) which may cause wrong locale to be selected in request that is processed at the same time in one thread while another thread is using force_locale. Setting locale to request context is thread-safe as Flask doesn't share request contexts between threads. I've added a test case to verify that this fix works, and it failed without changes to force_locale.

opened Oct 8, 2017 by lautat 8

Closed

Add basic support for locales unkown by Babel

Right now Flask breaks if you request content in a locale that is unknown by Babel even if the translation files actually exist.

This commit allows translations to be loaded even if the locale is unknown by Babel. Numbers and datetimes ~are returned directly~ use the default locale as a fallback.

opened Jul 24, 2017 by MarcAbonce 8

Open

Doc: Remove dropped Jinja extension from example babel cfg

To address #195

opened Jun 13, 2022 by Dosenpfand 0

Open

improve docstrings and comments of init,py

null

opened May 31, 2022 by bariod 0

Open

Error: list_translations does not return config dependent default translation.

Greetings,

I've recently stumbled upon a peculiar behavior of Flask-Babel that I believe being an error (unless of course I am missing something).

As the title says, the list_translations method does not return a config aware default translation (that is, when no translations are available). Instead, the default case (handled at lines 158-159) returns a Locale instance based on _default_locale.

That contrasts with the way the topic is handled in default_locale, default_timezone and domain properties that all return config aware values.

Considering that default values for the configuration are set to the values of private properties (in init_app, including BABEL_DEFAULT_LOCALE that derives its default value from _default_locale) shouldn't list_translations return config aware value instead?

opened Apr 28, 2022 by born2discover 0

Open

Add support for multiple domains

Adds support for loading translations from different domains in the same Flask-Babel instance.

To be clear, our application (CKAN) supports the following setup for translations:


/path/to/core/translations/ckan.pot

/path/to/ckanext-ext1/translations/ckanext-ext1.pot

/path/to/ckanext-ext2/translations/ckanext-ext2.pot

After the refactor in python-babel/flask-babel#163 there is no longer support for defining different translation domains for different translation directories. @ThiefMaster mentioned in #163 that it superseded the now closed #148, but I haven't been able to figure out how multiple domains could be supported in the new version. AFAICT, when loading the translations, a single domain is always used, thus preventing loading translations from directories that use a different domain:

https://github.com/python-babel/flask-babel/blob/ec7ae9ed2e22c7aebd4e732c1c3dc6d45fe8db76/flask_babel/init.py#L564

This change adds support for a semi-colon separated list of domains in BABEL_DOMAIN, that must match a list passed to BABEL_TRANSLATION_DIRECTORIES.

I'm not sure if there is a more elegant way to achieve the same result but happy to change the approach.

opened Mar 18, 2022 by amercader 0

Open

Allow loading translations for a specific locale

So far, flask_babel supports translation to the locale selected for the request. If one needs a translation into a different locale, one would need to replicate parts of flask_babel's code. A use case for this is, for example, sending an email to a site administrator in the admininistrator's language.

from flask_babel import Domain
from babel import Locale

domain = Domain(locale=Locale.parse(admin_lang))
email_body = render_template('admin_email.html', _=domain.gettext)

opened Oct 7, 2021 by amadanmath 1

Open

Install `pgettext`, `npgettext` for Jinja templates

This makes these callables (instead of None in both cases) available for use as functions in Jinja templates using Flask's/Jinja's own hook.

I took the liberty to turn the first two positional arguments into keyword arguments to align with the rest of the arguments and make it easier to understand what they refer to.

I also renamed the argument x to s (for "string") as used in the implementation of Domain.gettext to align it with the other anonymous functions' arguments' names.

opened Jul 18, 2021 by homeworkprod 1

v2.0.0(Aug 26, 2020)

Starting with version 2, flask-babel drops official support for Python2. Python versions 3.5 through 3.9-beta1 are tested and supported, as well as pypy3.

Tests moved from unittest to pytest (#163)
Domain and caching support from Flask-BabelEx (#163)
Documentation moved from python-hosted to Github Pages.
CI moved from Travisci to Github Actions
Small documentation improvements.
Removed uncessary checks on get_translations() (#127, #126)
localeselector and timezoneselector can be changed after creation.

Source code(tar.gz)
Source code(zip)

v1.0.0(Feb 6, 2020)

v1.0.0 - 06/02/2020

Starting with version 1, flask-babel has changed to Semantic Versioning.

Changed

pytz is an explicit dependency. (#14)
pytz.gae, used for Google App Engine, is no longer necessary and has been removed. (#153)
Fixed a deprecated werkzeug import (#158).
Fix issues switching locales in threaded contexts (#125).

Source code(tar.gz)
Source code(zip)

Fork of Flask-RESTPlus: Fully featured framework for fast, easy and documented API development with Flask

An improved shell command for the Flask CLI

A wrapper for Babel's parser used for ESLint

vue-i18n-filter - Vue filter extend for Vue-i18n, simply using {{ hello world | t }}.

vue-i18n-extract - Manage vue-i18n localization with static analysis. Make reports about missing and unused i18n entries.

codemod rewrites JavaScript and TypeScript using babel plugins.

PyMongo support for Flask applications

Adds APScheduler support to Flask

🍦 A simple way to introduce internationalization to your JS

Flask extension to build REST APIs around JSONAPI 1.0 specification.

Flask tutorial for beginners

Simple CLI for managing Postgres databases in Flask.

Find dependencies to transpile with Babel.

Flask cookiecutter template for builing APIs with flask-restful, including JWT auth, cli, tests, swagger, docker and more

Manage translation and localization with static analysis, for Ruby i18n

Package i18n provides an Internationalization and Localization middleware for Macaron applications

Package for simplifying work with i18n in WebExtensions

Flask-Bcrypt is a Flask extension that provides bcrypt hashing utilities for your application.

AZAP Flask boilerplate for creating API's with flask.

cargo-i18n - Cargo sub-command to extract and build localization resources to embed in your application/library

Simple and extensible administrative interface framework for Flask

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