ENH: Explicitly opt out of pytz support

[davetapley]

Feature Type

• Adding new functionality to pandas

• Changing existing functionality in pandas

• Removing existing functionality in pandas

Problem Description

I wish I could explicitly opt out of using pytz with pandas, even if another library (APScheduler in my case) uses it as a dependency.

APScheduler is due to also drop pytz requirement in future, but I'd like to get ahead now.

Feature Description

Patch here to

pandas/pandas/_libs/tslibs/timezones.pyx

Line 25 in 2a10e04

pytz = import_optional_dependency("pytz", errors="ignore")

pandas/pandas/_libs/tslibs/timezones.pyx

Line 41 in 2a10e04

cdef tzinfo utc_pytz = pytz.UTC if pytz else None

Alternative Solutions

N/A

Additional Context

• API: Default to stdlib timezone objects instead of pytz #34916
• DEPS: Make pytz an optional dependency #59089

[rhshadrach]

Thanks for the request. From

https://pandas.pydata.org/docs/dev/whatsnew/v3.0.0.html#pytz-now-an-optional-dependency

it is my understanding that in 3.0 you should not be getting pytz objects unless you are explicitly using them. So I'm not sure what it'd mean to "explicitly opt out of pytz". Can you clarify?