Choose an element from multidimensional array

[quest_]

Hello,
I want to choose a random element from multidimensional array. I have this code but I have "list indices must be integers or slices not tuple" error
I have this array: [[000],[001],[010]…] and I want to choose 1 triplet inside this array randomly like [001]
Here is my code

random_angles = []
for triplet in itertools.product([th2, th1], repeat=3): 
    random_angles.append(triplet)
#print(random_angles)
choosen_triplet_m= []
for i in range (10):
    choosen_triplet = np.random.randint(3, size=1)
    print("choosen triplet",random_angles[choosen_triplet[0],:])
    choosen_triplet_m.append(random_angles[choosen_triplet[0],:])

How can I solve this error??