python how to sum columns of an array
# Example usage 1: import numpy as np numpy_array = np.array([[1, 2, 3, 4, 5], [1, 2, 3, 4, 5], [1, 2, 3, 4, 5]]) np.sum(numpy_array, axis=0) --> array([ 3, 6, 9, 12, 15]) # Example usage 2 (without numpy): array = [[1, 2, 3, 4, 5], [1, 2, 3, 4, 5], [1, 2, 3, 4, 5]] [sum(x) for x in zip(*array)] --> [3, 6, 9, 12, 15]