Python3、Jinja2、预编译模板、本地化

Question

I have some old project .po/.mo files with placeholders like %s and it was used to translate python strings But now I have these strings in jinja2 templates

Problem is that in .po file %s meanwhile in template {{ some_var }}

eg I have template:

{% if some_var %}
Some text {{ some_var }}
{% else %}
Some another text {{ some_var1 }}
{% endif %}

I want to execute only conditions, filters, etc. So I want to get string

Some another text {{ some_var1 }}

or

Some text {{ some_var }}

Next, I will get placeholders order and replace them with %s, use gettext and finally render the template

Any suggestions? Thank you

Answer 1

There is no automatic way to do that but you can just use the old .po files. If your build system uses msgmerge for updating the .po files, the old translations will be reused but as "fuzzy" entries. You can then update the translations in the .po files.

You can also do that by hand. Assuming that your .pot file is myproject.pot and you want to merge that into the existing (old) file ru.po you do:

$ msgmerge --previous --verbose ru.po myproject.pot

If you wonder why you cannot do that automatically: You want to replace %s with something like {{some_var}} . Where should the information that the placeholder is some_var come from? In your old files, you always used %s and in the new files, the placeholders depend on the context.