[Python-ideas] Combine f-strings with i18n - How about using PEP 501?

Chris Angelico rosuav at gmail.com
Wed Sep 19 02:55:38 EDT 2018

On Wed, Sep 19, 2018 at 4:52 PM Anders Hovmöller <boxed at killingar.net> wrote:
> > How about this: Have a script that runs over your code, looking for
> > "translatable f-strings":
> >
> > _(f'Hi {user}')
> >
> > and replaces them with actually-translatable strings:
> >
> > _('Hi %s') % (user,)
> > _('Hi {user}').format(user=user)
> >
> > Take your pick of which way you want to spell it. Either of these is
> > easily able to be picked up by a standard translation package, is 100%
> > legal Python code in today's interpreters, and doesn't require any
> > bizarre markers and such saying that things need to be processed out
> > of order (the parentheses specify the order for you).
> I guess it wasn't clear before.. that's exactly what I was proposing :)
> I'd suggest using parso to do it. It's a really great library to write such transformations.

Ah. It wasn't clear what your destination was, so I thought you were
talking about doing the translation itself using parso. But yeah, grab
one of these sorts of parsing libraries, do the transformation, save
back, then use a standard translation library. Seems a lot easier than
changing the language.


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