import threading
import time

def run(n):
    print("task ", n)
    time.sleep(2)
    print("task done", n)

start_time = time.time()
t_objs = []  # 存线程实例
for i in range(10):
    t = threading.Thread(target=run, args=("t-%s" % i,))  # 起线程
    t.start()
    t_objs.append(t)  # 为了不阻塞后面线程的启动，不在这里join，先放到一个列表里

for t in t_objs:  # 循环线程实例列表，等待所有线程执行完毕
    t.join()

print("----------all threads has finished...")
print("cost:", time.time() - start_time)

import threading
import time


class MyThread(threading.Thread):
    def __init__(self, n, sleep_time):
        super(MyThread, self).__init__()
        self.n = n
        self.sleep_time = sleep_time

    def run(self):
        # 重写父类的run 函数，所以只能是这个函数名
        print("runnint task ", self.n)
        time.sleep(self.sleep_time)
        print("task done,", self.n)

t1 = MyThread("t1", 2)
t2 = MyThread("t2", 4)

t1.start()
t2.start()

t1.join()
t2.join()
# 写上这两句之后，先把t1和t2执行完之后再执行print("main thread....")，不然就是先执行print("main thread....")

import threading
import time

def run(n):
    print("task ",n )
    time.sleep(5)
    print("task done",n,threading.current_thread())

start_time = time.time()
t_objs = [] #存线程实例
for i in range(5):
    t = threading.Thread(target=run,args=("t-%s" %i ,))
    t.setDaemon(True) #把当前线程设置为守护线程
    t.start()
    t_objs.append(t) #为了不阻塞后面线程的启动，不在这里join，先放到一个列表里

for t in t_objs: #循环线程实例列表，等待所有线程执行完毕，只有当这里面的线程执行完之后程序才往下走，
    t.join()

time.sleep(1)
print("----------all threads has finished...",threading.current_thread(),threading.active_count())
print("cost:",time.time() - start_time)

import threading
import time


def run(n):
    lock.acquire()  # 加锁，
    global num
    num += 1
    time.sleep(0.2)
    lock.release()  # 解锁

lock = threading.Lock()  # 生成一个线程锁实例
num = 0
t_objs = []  # 存线程实例
for i in range(5):
    t = threading.Thread(target=run, args=("t-%s" % i,))
    t.start()
    t_objs.append(t)  # 为了不阻塞后面线程的启动，不在这里join，先放到一个列表里

for t in t_objs:  # 循环线程实例列表，等待所有线程执行完毕
    t.join()

print("all threads has finished ：", threading.current_thread(), threading.active_count())

print("num:", num)

import threading, time


def run1():
    print("grab the first part data")
    lock.acquire()
    global num
    num += 1
    lock.release()
    return num

def run2():
    print("grab the second part data")
    lock.acquire()
    global num2
    num2 += 1
    lock.release()
    return num2

def run3():
    lock.acquire()
    res = run1() #这里执行run1，而run1中已有锁，所以需要递归锁，使用和平常锁一样，只是在声明时声明为递归锁就行
    print(‘--------between run1 and run2-----‘)
    res2 = run2()
    lock.release()
    print(res, res2)

num, num2 = 0, 0
lock = threading.RLock() #声明为递归锁
for i in range(1):
    t = threading.Thread(target=run3)
    t.start()

while threading.active_count() != 1:
    print(threading.active_count())
else:
    print(‘----all threads done---‘)
    print(num, num2)

import threading, time


def run(n):
    semaphore.acquire()
    time.sleep(1)
    print("run the thread: %s\n" % n)
    semaphore.release()

if __name__ == ‘__main__‘:
    semaphore = threading.BoundedSemaphore(5)  # 最多允许5个线程同时运行
    for i in range(22):
        t = threading.Thread(target=run, args=(i,))
        t.start()
while threading.active_count() != 1:
    pass  # print threading.active_count()
else:
    print(‘----all threads done---‘)
    # print(num)

    # 信息号和线程锁用法一样，只是在声明时声明一个信息号就行

import time
import threading


event = threading.Event()

def lighter():
    count = 0
    event.set() #先设置绿灯
    while True:
        if count >5 and count < 10: #改成红灯
            event.clear() #把标志位清了
            print("\033[41;1mred light is on....\033[0m")
        elif count >10:
            event.set() #变绿灯
            count = 0
        else:
            print("\033[42;1mgreen light is on....\033[0m")
        time.sleep(1)
        count +=1

def car(name):
    while True:
        if event.is_set(): #代表绿灯
            print("[%s] running..."% name )
            time.sleep(1)
        else:
            print("[%s] sees red light , waiting...." %name)
            event.wait()
            print("\033[34;1m[%s] green light is on, start going...\033[0m" %name)


light = threading.Thread(target=lighter,)
light.start()

car1 = threading.Thread(target=car,args=("Tesla",))
car1.start()

# 生产者 消费者模型
import threading,time

import queue

q = queue.Queue(maxsize=10)  # 定义一个共用的线程queue

def Producer(name):
    count = 1
    while True:
        q.put("包子%s" % count)
        print("生产了包子",count)
        count +=1
        time.sleep(0.5)

def Consumer(name):
    #while q.qsize()>0:
    while True:
        print("[%s] 取到[%s] 并且吃了它..." %(name, q.get()))
        time.sleep(1)

p = threading.Thread(target=Producer,args=("zhangsan",))
c = threading.Thread(target=Consumer,args=("lishi",))
c1 = threading.Thread(target=Consumer,args=("wangwu",))

p.start()
c.start()
c1.start()