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  • Using numpy just to check if a list is empty seems heavy handed. Commented May 16, 2017 at 15:10
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    @Pengo: I did not suggest to convert a list to a numpy array. This answer assumes that 'a' already is a numpy array. Talking about 'arrays' in Python quickly refers to numpy arrays, because natively Python does not have Array objects, just Lists. Commented May 16, 2017 at 18:59