Make the gettext functions accept a localedir of type Traversable

Feature or enhancement

Proposal:

from gettext import bindtextdomain, find, translation
import importlib.resources

bindtextdomain("demo-zipapp", importlib.resources.files("demo_zipapp").joinpath("locales"))
translation("demo-zipapp", importlib.resources.files("demo_zipapp").joinpath("locales"))
find("demo-zipapp", importlib.resources.files("demo_zipapp").joinpath("locales"))

In ZipApp, since files within the application cannot be read directly through traditional file APIs, it is necessary to use importlib.resources.files to read them.

importlib.resources.files returns a Traversable object, which is not supported by gettext.

Here is a demo app: demo-zipapp.zip (source) | demo-zipapp.zip (zipapp)

Has this already been discussed elsewhere?

I have already discussed this feature proposal on Discourse

Links to previous discussion of this feature:

https://discuss.python.org/t/make-the-gettext-functions-accept-a-localedir-of-type-traversable/107330

Linked PRs

• gh-149810

Start with the gettext.bindtextdomain, gettext.translation, and gettext.find entry points, then review linked PR gh-149810 and the referenced Discourse discussion. The change is complete when these functions accept a Traversable localedir for resources inside a ZipApp, with coverage for the demonstrated usage.