import time, threading

def loop():

    print("thread %s is running..." % threading.current_thread().name)

    n=0

    while n<5:

        n = n+1

        print("thread %s >>> %s" % (threading.current_thread().name, n))

        time.sleep(1)

    print("thread %s ended." % threading.current_thread().name)

print("thread %s is running..." % threading.current_thread().name)

t = threading.Thread(target=loop, name='LookpThread') #创建线程

t.start() #开始线程

t.join() #等待线程结束

print("thread %s ened." % threading.current_thread().name)

def run_thread(n):

    for i in range(100000):

        lock.acquire()  # 先要获取锁:

        try:

            change_it(n) # 放心地改吧:

        finally:

            lock.release()   # 改完了一定要释放锁:

#Python虽然不能利用多线程实现多核任务，但可以通过多进程实现多核任务。多个Python进程有各自独立的GIL锁，互不影响。

import threading

local_school = threading.local() #创建一个全局对象

def process_student():

    stu = local_school.student #根据运行的线程取出student对象

    print("hwllo, %s (in %s)" % (stu, threading.current_thread().name))

def process_thread(name):

    local_school.student = name #每个运行的线程创建的student不一样

    process_student()

t1 = threading.Thread(target=process_thread, args=('fengyong',), name='thread-A')

t2 = threading.Thread(target=process_thread,args=('binyan',), name='thread-B')

t1.start()

t2.start()

t1.join()

t2.join()