sqrt doesn't work on PintArrays

[burnpanck]

The following code fails in the last line:

import numpy as np
import pandas as pa
import pint_pandas

x = pint_pandas.PintArray(np.arange(4),"m")
print(np.sqrt(x.quantity))
print(np.sqrt(x))

[burnpanck]

This is probably a duplicate of #65.

[andrewgsavage]

sqrt isn't affected by __array_ufunc__ https://numpy.org/doc/1.14/neps/ufunc-overrides.html#list-of-operators-and-numpy-ufuncs

I think implementing __array_function__ would fix sqrt and many other np functions. It'd affect PintArray but not Series

[burnpanck]

Thanks for the clarification! I didn't pay attention to the distinction of the two. So maybe I should edit this issue to make it ask for __array_function__?

[andrewgsavage]

well the code in OP works now, as of #160