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())