How to access ureg in df.pint?

[deeplook]

I have a simple function I want to use on a dataframe's rows with df.apply(), say:

def func(col1, col2):
    return 2 * (col1 * col2) - Q_("5 kg")

But I get this error because this mixes two unit registries, so the question is how to access the one inside the dataframe?

ValueError: Cannot operate with Quantity and Quantity of different registries.

[deeplook]

Solved it using sth. like pint_pandas.PintType.ureg = ureg as suggested in https://github.com/hgrecco/pint-pandas/blob/master/notebooks/pint-pandas.ipynb.