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:
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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 })
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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
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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()
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方法三:用theading.Thread直接返回一个thread对象,然后运行它的start方法
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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()
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