How to applied a user defined function to each of the numpy array elements

Question

I would like to apply a function to each of the element of my numpy array. I did some thing like this; but it still print the original array. What might be the problem?

def my_func(k):
    3.15+ k*12**45+16

arr = np.array([12,45,45],[12,88,63])
my_func(arr)
print (arr)

Answer 1

Try this:

def my_func(k):
    return 3.15 + k * 12 ** 45 + 16

arr = np.array([[12, 45, 45], [12, 88, 63]])
print my_func(arr)

Output:

[[4.388714385610605e+49 1.6457678946039768e+50 1.6457678946039768e+50]
 [4.388714385610605e+49 3.218390549447777e+50 2.3040750524455676e+50]]

The problem is that you don't return a value from your function. Then you don't define correctly the data for np.array. Finally, you don't set the my_func's result in a variable.