I'm working with data, I have phi, lambda, and Z, looks like this: 18.49528 88.29922 2.955 19.24444 103.70188 528.784 24.79509 107.41260 36.138 24.80513 107.40091 33.336 I read the file, and then extract the data using names import numpy as np file=np.loadtxt('data.txt') phi=file[:,0] lambda=file[:,1] Z=file[:,2] but then I have to solve some equations, and in one factor, I should have only the part integer from lambda so I did this for i in lambda: print(int(i)) A=(int(i)) when I print int(i) I get only the part integer, but when I want to save it in a variable, this only save one value, and I want all the values of lambda but only the part integer, how could I fix it? Continue reading...