divide this ['a', 'b', 'c', '1', '2', '3','4', '5', '6'] evenly into three separate list

def partition(my_list, num_buckets):
    bucket_size = len(my_list) // num_buckets
    buckets = []
    for bucket_index in range(num_buckets):
        start = bucket_index * bucket_size
        end = start + bucket_size
        buckets.append(my_list[start:end])
    return buckets