same_dimensions_2d.py

import numpy as np

# 2 dimensional arrays
a1=np.ones([2,1])
print (a1)
#Output: 
[[1.]
 [1.]]
 
a2=np.arange(1,5).reshape(2,2)
print (a2)
#Output
[[1 2]
 [3 4]]
 
print (a1+a2)
#Output:
[[2. 3.]
 [4. 5.]]