line res_data = self.data[raw_broadcasted_key] from Array.__getitem__ generates the following FuturWarning messages:
FutureWarning: Using a non-tuple sequence for multidimensional indexing is deprecated; use arr[tuple(seq)] instead of arr[seq]. In the future this will be interpreted as an array index, arr[np.array(seq)], which will result either in an error or a different result.