guidance on making datetimeoffset usable from fable python

[joprice]

I'm interested in fixing the issues with datetime wrt Python. I see the comment in the changelog regarding issues with the implementation, but is this still valid and if so, do you have any more details where perhaps I can try to do a pr to fable to fix it?

Thoth.Json/packages/Thoth.Json.Core/Decode.fs

Line 403 in 4186268

#if !FABLE_COMPILER_PYTHON

[MangelMaxime]

I don't think the issue has been solved in Fable so the first thing will be to fix fable-library-py/date_offset.py in Fable.

I am just not sure, if we need to just fix the ToString("O") method or if like for DateTime we need to fix the whole type support.

In order to write, date_to_string_with_custom_format (for DateTime) I adapted the original C# code and transformed it into Python. But for DateTimeOffset we don't need to do the same because we can probably transform DateTimeOffset in a DateTime or share the logic.

If you want to learn how to work with Fable code, I did a F# Amplifying session. Or you can ping me on discord or slack, and we can hope in a call to get you started.

[joprice]

Great I'll watch that talk. I've written a Myriad plugin that I'm using to generate 10s of thousands of lines of encoders/decoders, and hit this when I started trying to use the shared models from fable python. For now, I might just make a newtype that wraps a unix timestamp represented in json as a string and avoid the problem altogether. Eventually, of course, it would be nice to have this supported universally.