data=np.array([1,2])
data2=np.array([2,3])
np.add(data,data2)
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
data = np.array([1, 2])
ones = np.ones(2, dtype=int)
data + ones