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pythonflaskpython-babelflask-babel

Flask-Babel updating of existing messages.pot file

How to update an existing messages.pot file? For example, I have translated messages.pot file:

....
#: forms.py:11
msgid "Nickname"
msgstr "Имя"

#: forms.py:18
msgid "Wrong email"
msgstr "Неправильный пароль"
....

If I'll mark new text with selector gettext, for example:

flash(gettext('Login successful'))

and run: pybabel extract -F babel.cfg -o messages.pot
I'll receive a new messages.po file:

    ....
#: forms.py:11
msgid "Nickname"
msgstr ""

#: forms.py:18
msgid "Wrong email"
msgstr ""

#: models.py:783
msgid "Login successful"
msgstr ""
....

So, how can I update an existing messages.pot file, saving translated strings ("Nickname", "Wrong email")?

Solution

  • pot file not for translations, it just list of all strings for translation without specific language.

    For real translations used po - text file and mo - binary file with translations. This files will created for any languages that you need. See my files structure:

    translations/
translations/ru/
translations/ru/LC_MESSAGES/
translations/ru/LC_MESSAGES/messages.mo
translations/ru/LC_MESSAGES/messages.po
translations/messages.pot

    To get all strings for translation:

    pybabel extract -F babel.cfg -o messages.pot .

    To init po file (first time):

    pybabel init -i messages.pot -d . -l ru

    To update exist po file:

    pybabel update -i messages.pot -d .

    To compile po file to mo:

    pybabel compile -f -d .

    See more in documentation.