import queue

q = queue.SimpleQueue()

for n in range(10):
	q.put(n)

print("队列数量:", q.qsize())

while not q.empty():
	print(q.get())

print("队列状态：", q.empty())
			
		

先进先出队列，保持队列最大尺寸，超过尺寸自动出队

		 
from queue import Queue

q = Queue(maxsize=3)

for i in range(10):
	if q.full():
		q.get()
	q.put(i, block=False)


print(type(q.queue), q.queue)

while not q.empty():
	i = q.get(block=False)
	print(i)		
		
		

		 
from queue import Queue

q = Queue(maxsize=10)

for i in range(20):
	if q.full():
		q.get()
	q.put(i, block=False)


print(type(q.queue), q.queue)

for n in range(5):
	if not q.empty():
		i = q.get(block=False)
		print(i)