UTC is not a BaseTzInfo instance?

[jenstroeger]

I am confused by the following behavior:

>>> import pytz
>>> pytz.__version__
'2018.3'
>>> utc = pytz.timezone('UTC')
>>> la = pytz.timezone('America/Los_Angeles')
>>> isinstance(utc, pytz.tzinfo.BaseTzInfo)
False
>>> isinstance(la, pytz.tzinfo.BaseTzInfo)
True

Is this intended, and if so, why?

Thanks!

[stub42]

It wasn't intentional, and should probably be fixed per https://bugs.launchpad.net/pytz/+bug/1696956

Its not completely trivial, due to the pickling optimizations being done for UTC.

[jenstroeger]

@stub42, yes that’s the same problem I’ve encountered in a very similar context, see the referenced issue kvesteri/sqlalchemy-utils#315. Any estimate as to when this will be fixed?

[jenstroeger]

@stub42, looks like you’ve fixed it: https://git.launchpad.net/pytz/commit/?id=fae0ac547f40eed5a9cce27e0b53cfc2fadfaabe.

Its not completely trivial, due to the pickling optimizations being done for UTC.

Looks like it was indeed a simple fix! I’ll keep an eye out for the update! 👍🏽