import numpy as np  

arr = [[1, 17, 12, 12, 36],  
        [78, 16, 27, 70, 21], 
        [98, 45, 42, 11, 45, ]] 
      
# sum along the columns
print("sum of our array along the columns by setting axis = 0 : ", np.sum(arr, axis = 0)) 
    
# sum along the rows
print("sum  of our array along the rows by setting axis = 1 : ", np.sum(arr, axis = 1))