Pandas error durind _find_elite

[fpartika]

At first congrats for the initiative, your implementation is brilliant!

I'm getting sporadically the same error in line:

weights_sorted = pd.Series(self._generation, index=scores).sort_index(ascending=False)

that is triggered from inside the series.py inside pandas, at the code:

        elif is_list_like(data):

            # a scalar numpy array is list-like but doesn't
            # have a proper length
            try:
                if len(index) != len(data):
                    raise ValueError(
                        f"Length of passed values is {len(data)}, "
                        f"index implies {len(index)}."

What I noticed is that this only occurs when index become (for some reason) a pandas Multindex instead of a list of arrays, it raises the following error message:

ValueError: Length of passed values is 14, index implies 1.

Thanks!