day10-12_線程queue(了解)
queue隊列 ：使用import queue，用法與進程Queue一樣
queue is especially useful in threaded programming when information must be exchanged safely between multiple threads.
一、class queue.Queue(maxsize=0) #先進先出
import queue
q=queue.Queue()
q.put('first')
q.put('second')
q.put('third')
print(q.get())
print(q.get())
print(q.get())
'''
結果(先進先出):
first
second
third
'''
二、class queue.LifoQueue(maxsize=0) #last in fisrt out
import queue
q=queue.LifoQueue()
q.put('first')
q.put('second')
q.put('third')
print(q.get())
print(q.get())
print(q.get())
'''
結果(后進先出):
third
second
first
'''
三、class queue.PriorityQueue(maxsize=0) #存儲數據時可設置優先級的隊列
import queue q=queue.PriorityQueue() #put進入一個元組,元組的第一個元素是優先級(通常是數字,也可以是非數字之間的比較),數字越小優先級越高 q.put((20,'a')) q.put((10,'b')) q.put((30,'c')) print(q.get()) print(q.get()) print(q.get()) ''' 結果(數字越小優先級越高,優先級高的優先出隊): (10, 'b') (20, 'a') (30, 'c') '''
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