set_normalize_KPM function

[katherinethibault]

Hi @fmartinache,

In your latest update in the kpi.py file, I notice that in the function set_normalize_KPM, if setting is False, the variable _KMP0 is not declare. I know that the default is True but if we want it False, I think what we should see is self.KPM = self.KPM.copy(). I will try to do a PR if it is the right fix.