网站做https/培训心得体会范文

多线程和多进程不同之处在于，多线程和父线程（进程）是共享内存的，多线程之间是共用一个进程的内存，这也就是一个子线程挂掉，其他子线程也会挂掉的原因

例子：进程定义了一个初始值，t1线程对初始值做加法运算后，t2线程可以直接调用t1线程加法后的结果进行二次运算，因为他们直接是共享同一个进程的内存的

[root@web thread_process]# cat threading10.py
#!/usr/bin/env pythonimport threading
import timeclass MyThread(threading.Thread):def __init__(self, number, increment):super(MyThread, self).__init__()self.number = numberself.increment = incrementdef run(self):print 'set init number: {0}'.format(self.number)for i in xrange(5):self.number += self.incrementtime.sleep(1)print 'set number to: {0}'.format(self.number)if __name__ == '__main__':number = 0t1 = MyThread(number, 1)t1.start()t1.join()                       //阻塞进程和t2线程，为的是t2线程获得t1线程运算完的结果t2 = MyThread(t1.number, 3)t2.start()   [root@web thread_process]# python threading10.py
set init number: 0
set number to: 1
set number to: 2
set number to: 3
set number to: 4
set number to: 5
set init number: 5
set number to: 8
set number to: 11
set number to: 14
set number to: 17
set number to: 20