20.multi_case03

# 多线程
import threading
import time
class myThread(threading.Thread):
    def __init__(self, threadID, name, counter):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.counter = counter
    def run(self):
        print("Starting " + self.name)
        # 获得锁，成功获得锁定后返回True
        # 可选的timeout参数不填时将一直阻塞直到获得锁定
        # 否则超时后将返回False
        threadLock.acquire()
        print_time(self.name, self.counter, 3)
        # 释放锁
        threadLock.release()
def print_time(threadName, delay, counter):
    while counter:
        time.sleep(delay)
        print("%s: %s" % (threadName, time.ctime(time.time())))
        counter -= 1
threadLock = threading.Lock()
threads = []
# 创建新线程
thread1 = myThread(1, "Thread-1", 1)
thread2 = myThread(2, "Thread-2", 2)
# 开启新线程
thread1.start()
thread2.start()
# 添加线程到线程列表
threads.append(thread1)
threads.append(thread2)
# 等待所有线程完成
for t in threads:
    t.join()
print("Exiting Main Thread")

import threadpool
import time
def sayhello(a):
    print("hello: " + a)
    time.sleep(2)
def main():
    global result
    seed = ["a", "b", "c"]
    start = time.time()
    task_pool = threadpool.ThreadPool(5)
    requests = threadpool.makeRequests(sayhello, seed)
    for req in requests:
        task_pool.putRequest(req)
    task_pool.wait()
    end = time.time()
    time_m = end - start
    print("time: " + str(time_m))
    start1 = time.time()
    for each in seed:
        sayhello(each)
    end1 = time.time()
    print("time1: " + str(end1 - start1))
if __name__ == '__main__':
    main()

from concurrent.futures import ThreadPoolExecutor
import time
def sayhello(a):
    print("hello: " + a)
    time.sleep(2)
def main():
    seed = ["a", "b", "c"]
    start1 = time.time()
    for each in seed:
        sayhello(each)
    end1 = time.time()
    print("time1: " + str(end1 - start1))
    start2 = time.time()
    with ThreadPoolExecutor(3) as executor:
        for each in seed:
            executor.submit(sayhello, each)
    end2 = time.time()
    print("time2: " + str(end2 - start2))
    start3 = time.time()
    with ThreadPoolExecutor(3) as executor1:
        executor1.map(sayhello, seed)
    end3 = time.time()
    print("time3: " + str(end3 - start3))
if __name__ == '__main__':
    main()