[issue28602] `tzinfo.fromutc()` fails when used for a fold-aware tzinfo implementation

[Paul G]

Paul G added the comment:

> After all, how much effort would it save for you in dateutil if you could reuse the base class fromutc?

Realistically, this saves me nothing since I have to re-implement it anyway in in all versions <= Python 3.6 (basically just the exact same algorithm with line 997 replaced with enfold(dt, fold=1) rather than dt.replace(fold=1), but I'd rather it fall back to the standard `fromutc()` in fold-aware versions of Python 3.6.

That said, I don't see how it's a big can of worms to open. If you're going to provide `fromutc()` functionality, it should not be deliberately broken. As I mentioned above, I see no actual downside in having `fromutc()` actually work as advertised and as intended.

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<http://bugs.python.org/issue28602>
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