nonlinear.py: AttributeError: module 'biosppy' has no attribute 'utils'

[davidmarcelbauminteraxon]

Hey devs,

Throughout the nonlinear.py codes, import biosppy (line 45) and then calling biosppy.utils.ReturnTuple(args, names) throws the following error:
AttributeError: module 'biosppy' has no attribute 'utils'

Installed libraries

biosppy==2.2.1
pyhrv==0.4.1

Proposed fix

I am circumventing this by directly importing the ReturnTuple class from biospyy.utils:
from biosppy.utils import ReturnTuple
ReturnTuple(args, names)