lst = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
result = [lst[x:x+3] for x in range(0, len(lst), 3)]
print(result)
bHN0ID0gWzEsIDIsIDMsIDQsIDUsIDYsIDcsIDgsIDksIDEwXQoKcmVzdWx0ID0gW2xzdFt4OngrM10gZm9yIHggaW4gcmFuZ2UoMCwgbGVuKGxzdCksIDMpXQoKcHJpbnQocmVzdWx0KQ==
[[1, 2, 3], [4, 5, 6], [7, 8, 9], [10]]