numpy shallow copy issue

[qsisi]

Hello.

polex/poles/poles.py

Line 93 in 1d1d181

lastcentroid = optcentroids[ic]

This is a shallow copy of numpy array, but the code seems to need the deep copy of optcentroids[ic] -> lastcentroid, so does this need to be modified? It looks like it does not make too "much" affect on the output poleparams.