(1) import numpy as np a=(3,3) b=(4,4) c=a+b print(c)
(3, 3, 4, 4)
(2) import numpy as np
a = np.array(range(3), dtype=’float64’) b = np.zeros(3) a array([ 0., 1., 2.]) b array([ 0., 0., 0.]) test = a test += np.ones(3) a array([ 1., 2., 3.]) test = b test += np.ones(3) b array([ 1., 1., 1.]) a array([ 1., 2., 3.])
