TypeError: No loop matching the specified signature and casting was found for ufunc true_divide

[thomas4721]

hello, i am trying this code and i got this error
"TypeError: No loop matching the specified signature and casting was found for ufunc true_divide"
in line 14 on "main.py"
train_images /= int(np.std(train_images))

can you help me to find a reason why i can get that error..
thank you

[JunningWu]

use // instead of /