use numpy append code example

Example 1: append value to numpy array

x = np.random.randint(2, size=10)
x = np.append(x, 2)

Example 2: how to add numpy arrays

added = a+b #elementwise
added_in_the_end = np.concatenate(a,b) #add at the end of the array
#if you want to add in multiple dimentions check the documentation of np.concatenate