import queue
# 以下三个队列都可以设置最大长度maxsize,默认是无限大
print("-------------queue.Queue----------------")
# 线程消息队列,FIFO(先进先出)
q = queue.Queue()
q.put("one")
q.put("two")
q.put("three")
print(q.get())
print(q.get())
print(q.get())
# print(q.get(timeout=3))     # 队列中没有数据,会阻塞

print("-------------queue.LifoQueue----------------")
# 线程消息队列,LIFO(后进先出)
lq = queue.LifoQueue()
lq.put("one")
lq.put("two")
lq.put("three")
print(lq.get())
print(lq.get())
print(lq.get())

print("-------------queue.PriorityQueue----------------")
# 线程消息队列,PriorityQueue(优先级的队列:数字越小优先级越高)
pq = queue.PriorityQueue()
pq.put((1, "Jet"))
pq.put((3, "Jack"))
pq.put((2, "Judy"))
print(pq.get())
print(pq.get())
print(pq.get())