Двумерный массив 1

M = 5
N = 4

a = [[0]*M for i in range(N)]

# заполнение:
for i in range(N):
    for j in range(M):
        a[i][j] = i + j

# распечатка:
for i in range(N):
    for j in range(M):
        print(a[i][j], end='\t')
    print()