Operations between arrays of quantity scalars and quantity holding array resulting in incorrect units

[andrewgsavage]

When implementing array_ufunc in pint-pandas I've hit some odd results.

import pint
ureg =pint.UnitRegistry()

Q_ = ureg.Quantity
q_arr = Q_(np.array([1,2]),"m")
arr_of_q = np.array([Q_(1,"m"), Q_(2,"m")], dtype="object")
C:\Users\A\AppData\Local\Temp\ipykernel_16288\106945721.py:3: UnitStrippedWarning: The unit of the quantity is stripped when downcasting to ndarray.

print(arr_of_q)
[<Quantity(1, 'meter')> <Quantity(2, 'meter')>]


print(q_arr*arr_of_q)
[<Quantity(1, 'meter')> <Quantity(4, 'meter')>] meter # odd to have meters inside and outside array


print(arr_of_q*q_arr)
[1 4] meter # Should be m^2