Python - funcion suma en matriz Python

def suma(lista):

    return sum([i for i in lista if i%2==0])

print(suma([1,2,3,4,5,6])) # 12

def suma(A, m,  n):

    sum = 0

    for i in range(0, m):

        for j in range (0, n):

            if bool(1 & A[i][j]):

                sum += A[i][j]

    return sum

a = [

 [1, 2, 3],

 [4, 5, 6],

 [7, 8, 9]

]

print(suma(a, 3, 3))