def op_unpack(engine):
items = PushData.pop_array(engine)
l = len(items)
for i in range(l - 1, -1, -1):
PushData.push(engine, items[i])
PushData.push_data(engine, l)
return VMState.NONE
def op_reverse(engine):
items = PushData.pop_array(engine)
items.reverse()
return VMState.NONE
