Python中有两个线程模块,分别是thread和threading,threading是thread的升级版。threading的功能更强大。
创建线程有3种方法:
1、thread模块的start_new_thread函数
2、继承自threading.Thread模块
3、用theading.Thread直接返回一个thread对象,然后运行它的start方法
方法一、thread模块的start_new_thread函数
其函数原型:
start_new_thread(function,atgs[,kwargs])
其参数含义如下:
function: 在线程中执行的函数名 args:元组形式的参数列表。 kwargs: 可选参数,以字典的形式指定参数(即对一些参数进行指定初始化)
代码
import thread def hello(id = 0, interval = 2): for i in filter(lambda x: x % interval == 0, range(10)): print "Thread id : %d, time is %d\n" % (id, i) if __name__ == "__main__": #thread.start_new_thread(hello, (1,2)) 这种调用形式也是可用的 #thread.start_new_thread(hello, (2,4)) thread.start_new_thread(hello, (), {"id": 1}) thread.start_new_thread(hello, (), {"id": 2})
方法二:继承自threading.Thread模块
注意:必须重写run函数,而且想要运行应该调用start方法
import threading class MyThread(threading.Thread): def __init__(self, id, interval): threading.Thread.__init__(self) self.id = id self.interval = interval def run(self): for x in filter(lambda x: x % self.interval == 0, range(10)): print "Thread id : %d time is %d \n" % (self.id, x) if __name__ == "__main__": t1 = MyThread(1, 2) t2 = MyThread(2, 4) t1.start() t2.start() t1.join() t2.join()
方法三:用theading.Thread直接返回一个thread对象,然后运行它的start方法
import threading def hello(id, times): for i in range(times): print "hello %s time is %d\n" % (id , i) if __name__ == "__main__": t = threading.Thread(target=hello, args=("hawk", 5)) t.start()