Symmetric Matrix Check

Problem

Return True if matrix A is square and symmetric (A[i][j] == A[j][i] for all i, j).

Return False for any non-square matrix.

Hint

Check the shape first, then compare mirrored entries.

case 1

in: [[[1,2],[2,3]]]

expected: true

case 2

in: [[[1,2],[3,4]]]

expected: false

case 3

in: [[[2,0,1],[0,-1,3],[1,3,5]]]

expected: true

case 4

in: [[[1,0],[0,1],[2,2]]]

expected: false

Starter codePython

def is_symmetric(A):
    # Your code here
    pass

4 test cases · run your code against them in the editor