[[0, 1, 0, 1, 0, 1, 0, 1],
[1, 0, 1, 0, 1, 0, 1, 0],
[0, 1, 0, 1, 0, 1, 0, 1],
[0, 0, 0, 0, 0, 0, 0, 0],
[0, 0, 0, 0, 0, 0, 0, 0],
[-1, 0, -1, 0, -1, 0, -1, 0],
[0, -1, 0, -1, 0, -1, 0, -1],
[-1, 0, -1, 0, -1, 0, -1, 0]]

import random
random.choice([(i, j) for i, row in enumerate(x) for j, val in enumerate(row) if val == 1])

indices = []
for row_idx in range(len(a)):
  for col_idx in range(len(a[row_idx])):
    num = a[row_idx][col_idx]
    if num == 1:
      indices.append((row_idx, col_idx))

import random
rand_idx = random.randrange(0, len(indices))
print indices[rand_idx]