Python 用隊列實現多線程並發

# Python queue隊列，實現並發，在網站多線程推薦最后也一個例子,比這貨簡單，但是不夠規范

# encoding: utf-8
__author__ = 'yeayee.com'  # 由本站增加注釋，可隨意Fork、Copy

from queue import Queue  # Queue在3.x中改成了queue
import random
import threading
import time


class Producer(threading.Thread):
    """
    Producer thread 制作線程
    """
    def __init__(self, t_name, queue):  # 傳入線程名、實例化隊列
        threading.Thread.__init__(self, name=t_name)  # t_name即是threadName
        self.data = queue

    """
    run方法 和start方法:
    它們都是從Thread繼承而來的，run()方法將在線程開啟后執行，
    可以把相關的邏輯寫到run方法中（通常把run方法稱為活動[Activity]）；
    start()方法用於啟動線程。
    """

    def run(self):
        for i in range(5):  # 生成0-4五條隊列
            print("%s: %s is producing %d to the queue!" % (time.ctime(), self.getName(), i))  # 當前時間t生成編號d並加入隊列
            self.data.put(i)  # 寫入隊列編號
            time.sleep(random.randrange(10) / 5)  # 隨機休息一會
        print("%s: %s producing finished!" % (time.ctime(), self.getName))  # 編號d隊列完成制作


class Consumer(threading.Thread):
    """
    Consumer thread 消費線程，感覺來源於COOKBOOK
    """
    def __init__(self, t_name, queue):
        threading.Thread.__init__(self, name=t_name)
        self.data = queue

    def run(self):
        for i in range(5):
            val = self.data.get()
            print("%s: %s is consuming. %d in the queue is consumed!" % (time.ctime(), self.getName(), val))  # 編號d隊列已經被消費
            time.sleep(random.randrange(10))
        print("%s: %s consuming finished!" % (time.ctime(), self.getName()))  # 編號d隊列完成消費


def main():
    """
    Main thread 主線程
    """
    queue = Queue()  # 隊列實例化
    producer = Producer('Pro.', queue)  # 調用對象，並傳如參數線程名、實例化隊列
    consumer = Consumer('Con.', queue)  # 同上，在制造的同時進行消費
    producer.start()  # 開始制造
    consumer.start()  # 開始消費
    """
    join（）的作用是，在子線程完成運行之前，這個子線程的父線程將一直被阻塞。
　　join()方法的位置是在for循環外的，也就是說必須等待for循環里的兩個進程都結束后，才去執行主進程。
    """
    producer.join()
    consumer.join()
    print('All threads terminate!')


if __name__ == '__main__':
    main()


"""運行結果：

Thu Feb  4 11:05:48 2016: Pro. is producing 0 to the queue!
Thu Feb  4 11:05:48 2016: Pro. is producing 1 to the queue!
Thu Feb  4 11:05:48 2016: Con. is consuming. 0 in the queue is consumed!
Thu Feb  4 11:05:49 2016: Pro. is producing 2 to the queue!
Thu Feb  4 11:05:50 2016: Pro. is producing 3 to the queue!
Thu Feb  4 11:05:51 2016: Pro. is producing 4 to the queue!
Thu Feb  4 11:05:52 2016: Con. is consuming. 1 in the queue is consumed!
Thu Feb  4 11:05:53 2016: <bound method Producer.getName of <Producer(Pro., started 6864)>> producing finished!
Thu Feb  4 11:06:00 2016: Con. is consuming. 2 in the queue is consumed!
Thu Feb  4 11:06:06 2016: Con. is consuming. 3 in the queue is consumed!
Thu Feb  4 11:06:06 2016: Con. is consuming. 4 in the queue is consumed!
Thu Feb  4 11:06:12 2016: Con. consuming finished!
All threads terminate!

"""