Support for Pandas 1.5/1.6

[andrewgsavage]

• Closes UnitStrippedWarning, simple case #128 Can pint-pandas better manage UnitStrippedWarning? And display() more nicely? #125 Grouping and Aggregating with NaN-values destroys dtype #117 Trouble using Quantity to extend existing DataFrame #113 TypeError using DataFrame.mask #93 TypeError: object of type 'numpy.float64' has no len() #26
• Executed pre-commit run --all-files with no errors
• The change is fully covered by automated unit tests
• Documented in docs/ as appropriate
• Added an entry to the CHANGES file

Probably closes #120

This is running locally, with hgrecco/pint#1596. Quite a few additional tests passing!
This is following the change to is_list_like in pandas, so allows constrcutors and setitem to work.

[andrewgsavage]

I've pointed this to my pint branch which adds ndim for Quantity, and my pandas branch which changes makes assert...equal recognise pint Quantitys as scalar. This is down to
=========== 489 passed, 11 xfailed, 7 xpassed, 6 warnings in 11.20s ============
It was previously
========== 433 passed, 64 xfailed, 8 xpassed, 246 warnings in 24.09s ===========

[andrewgsavage]

That's all the tests working with, the exception of the ones xfailed in pandas!

[andrewgsavage]

some issue with python 3.11 installing pyarrow so I'll leave that out for another PR.

[andrewgsavage]

This is ready now. @hgrecco Could you take a look at it?

I have set it to use my fork of pandas with branches for 1.5.x and 1.6.x to get around the assert_series_equal issue (pint scalars are recognised as iterable in a testing function). I've got a pandas issue and PR for this.

Is it better to have the affected tests xpassed, or to use my branches?
I'm leaning towards using my branches as this lets us run these tests and know if any changes cause behaviour to change.

[hgrecco]

I have review it and I like the code. Should I release a new pint-pandas version now?

I agree that you should use your branches for testing

[andrewgsavage]

OK great, I'll merge this and #132 and then you can release a new version.

[andrewgsavage]

bors r+

[bors]

Build succeeded:

• ci
• lint