Python diagonal sum

# A simple Python3 program to find
# sum of diagonals
MAX = 100
 
def printDiagonalSums(mat, n):
 
    principal = 0
    secondary = 0
    for i in range(0, n):
        principal += mat[i][i]
        secondary += mat[i][n - i - 1]
         
    print("Principal Diagonal:", principal)
    print("Secondary Diagonal:", secondary)
 
# Driver code
a = [[ 1, 2, 3, 4 ],
     [ 5, 6, 7, 8 ],
     [ 1, 2, 3, 4 ],
     [ 5, 6, 7, 8 ]]
printDiagonalSums(a, 4)
 
# This code is contributed
# by ihritik

Source: geeksforgeeks.org

Sum of diagonal numpy

arr= np.arange(16)
arr= np.reshape(arr,(4,4))

a=np.diagonal(arr, 0,0,1)

result=sum(a)
print(result)

-1

Source: numpy.org

Similar codes

0 vote210 views4 answers
Regex find all french phone number python
Python
9 votes208 views3 answers
Print for loop in same line python
Python
47 votes247 views5 answers
Sort the dictionary in python
Python
0 vote243 views3 answers
When was python 3 released
Python
0 vote206 views1 answer
The process of delivery of any desisered data
Python
5 votes213 views2 answers
Python how to put int into list
Python
0 vote179 views1 answer
Python extract mails from string
Python
0 vote237 views2 answers
Model.layers[4].set_weights([embedding_matrix])
Python
0 vote227 views1 answer
Python set timezone of datetime.now
Python
5 votes231 views1 answer
How to fill nas on a dataframe with median
Python