import numpy as np a = np.loadtxt('/temp/test.csv', delimiter=',') print(a)
array([[ 10., 11., 12., 13.], [ 20., 21., 22., 23.]])
b = a+100 print(b)
array([[ 110., 111., 112., 113.], [ 120., 121., 122., 123.]])
np.savetxt('/temp/test2.csv', b, delimiter=',', fmt='%d')