day34-python之进程调用

1.信号量

import threading,time
 
class myThread(threading.Thread):
    def run(self):
 
        if semaphore.acquire():
            print(self.name)
            time.sleep(3)
            semaphore.release()
 
if __name__=="__main__":
    semaphore=threading.Semaphore()
 
    thrs=[]
    for i in range(100):
        thrs.append(myThread())
    for t in thrs:
        t.start()

2.同步对象

import threading,time
class Boss(threading.Thread):
 
    def run(self):
        print("BOSS：今晚大家都要加班到22:00。")
        print(event.isSet())# False
        event.set()
        time.sleep(5)
        print("BOSS：<22:00>可以下班了。")
        print(event.isSet())
        event.set()
 
class Worker(threading.Thread):
    def run(self):
 
        event.wait()#    一旦event被设定，等同于pass
 
        print("Worker：哎……命苦啊！")
        time.sleep(1)
        event.clear()
        event.wait()
        print("Worker：OhYeah!")
 
if __name__=="__main__":
    event=threading.Event()
 
    threads=[]
    for i in range(5):
        threads.append(Worker())
    threads.append(Boss())
    for t in threads:
        t.start()
    for t in threads:
        t.join()
 
    print("ending.....")

3.生产者消费者模型

# import time,random
# import queue,threading
#
# q = queue.Queue()
#
# def Producer(name):
#   count = 0
#   while count <10:
#     print("making........")
#     time.sleep(5)
#     q.put(count)
#     print('Producer %s has produced %s baozi..' %(name, count))
#     count +=1
#     #q.task_done()
#     q.join()
#     print("ok......")
 
# def Consumer(name):
#   count = 0
#   while count <10:
#         time.sleep(random.randrange(4))
#     # if not q.empty():
#     #     print("waiting.....")
#         #q.join()
#         data = q.get()
#         print("eating....")
#         time.sleep(4)
#
#         q.task_done()
#         #print(data)
#         print('\033[32;1mConsumer %s has eat %s baozi...\033[0m' %(name, data))
#     # else:
#     #     print("-----no baozi anymore----")
#         count +=1
#
# p1 = threading.Thread(target=Producer, args=('A君',))
# c1 = threading.Thread(target=Consumer, args=('B君',))
# c2 = threading.Thread(target=Consumer, args=('C君',))
# c3 = threading.Thread(target=Consumer, args=('D君',))
#
# p1.start()
# c1.start()
# c2.start()
# c3.start()

4.递归锁

import  threading
import time
 
class MyThread(threading.Thread):
 
    def actionA(self):
 
        r_lcok.acquire() #count=1
        print(self.name,"gotA",time.ctime())
        time.sleep(2)
        r_lcok.acquire() #count=2
 
        print(self.name, "gotB", time.ctime())
        time.sleep(1)
 
        r_lcok.release() #count=1
        r_lcok.release() #count=0
 
    def actionB(self):
 
        r_lcok.acquire()
        print(self.name, "gotB", time.ctime())
        time.sleep(2)
 
        r_lcok.acquire()
        print(self.name, "gotA", time.ctime())
        time.sleep(1)
 
        r_lcok.release()
        r_lcok.release()
 
    def run(self):
 
        self.actionA()
        self.actionB()
 
if __name__ == '__main__':
 
    # A=threading.Lock()
    # B=threading.Lock()
 
    r_lcok=threading.RLock()
    L=[]
 
    for i in range(5):
        t=MyThread()
        t.start()
        L.append(t)
 
    for i in L:
        i.join()
 
    print("ending....")

5.进程调用

# from multiprocessing import Process
# import time
#
#
# def f(name):
#     time.sleep(1)
#     print('hello', name,time.ctime())
#
# if __name__ == '__main__':
#     p_list=[]
#     for i in range(3):
#
#         p = Process(target=f, args=('alvin',))
#         p_list.append(p)
#         p.start()
#
#     for i in p_list:
#         i.join()
#     print('end')
 
from multiprocessing import Process
import time
 
# class MyProcess(Process):
#
#     # def __init__(self):
#     #     super(MyProcess, self).__init__()
#     #     #self.name = name
#
#     def run(self):
#         time.sleep(1)
#         print ('hello', self.name,time.ctime())
#
 
# if __name__ == '__main__':
#     p_list=[]
#
#
#     for i in range(3):
#         p = MyProcess()
#         p.daemon=True
#         p.start()
#         p_list.append(p)
#
#     # for p in p_list:
#     #     p.join()
#
#     print('end')
 
# from multiprocessing import Process
# import os
# import time
#
#
# def info(title):
#     print("title:", title)
#     print('parent process:', os.getppid())
#     print('process id:', os.getpid())
#
# def f(name):
#
#     info('function f')
#     print('hello', name)
from multiprocessing import  Process
import  os
import time
def info(title):
    print("title",title)
    print("parent process:",os.getppid())
    print("process id:",os.getpid())
 
def f(name):
    info('function f')
    print("hello",name)
 
if __name__ == '__main__':
    info('main process line')
    time.sleep(1)
    print("-------")
    p = Process(target=info("yuan"))
    p.start()
    p.join()
# if __name__ == '__main__':
#
#     info('main process line')
#
#     time.sleep(1)
#     print("------------------")
#     p = Process(target=info, args=('yuan',))
#     p.start()
#     p.join()