Найти сумму чётных элементов двухмерного массива

import random 
N = 10
arr = [0] * N
for i in range(N):
    arr[i] = int(random() * 10)-5
print(arr)
s = 0
for i in range (N):
    if arr[i] >= 0 and arr[i]%2 == 0:
        s += arr[i]
print(s)

import random 
N = 10
arr  = []
for i in range(N):
    arr.append([])
    for j in range(N):
        arr[i].append(int(random.random() * 10)-5)
for i in range(N):
    print(*arr[i])
s = 0
for i in range (N):
    for j in range(N):
        if arr[i][j] >= 0 and arr[i][j]%2 == 0:
            s += arr[i][j]
print("s=",s)

import random 
N = 10
arr  = [[int(random.random() * 10)-5 for x in range(N)] for y in range(N)]
for i in range(N):
    print(*arr[i])
s = 0
for i in range (N):
    for j in range(N):
        if arr[i][j] >= 0 and arr[i][j]%2 == 0:
            s += arr[i][j]
print("s=",s)

import random 
N = 10
arr  = [[int(random.random() * 10)-5 for x in range(N)] for y in range(N)]
for i in range(N):
    print(*arr[i])
s = 0
for i in range (N):
   s=sum( (t for t in arr[i] if t >= 0 and t%2 == 0), s)
print("s=",s)