Boy I hope that the hiring manager at aws will like this

class Solution:
    def findIslandPerimeter(self, m):
        return sum(sum(4 - (i > 0 and m[i-1][j]) * 2 - (j > 0 and m[i][j-1]) * 2 for j in range(len(m[0])) if m[i][j]) for i in range(len(m)))