2018.10.15python-threading 多线程 的使用

	#!/usr/bin/python
import time
#利用time函数，
import threading
# print ("time.time(): %s " %time.time())
# print (time.localtime( time.time() ))
# print (time.asctime( time.localtime(time.time()) ))
def loop1(in1):
    print("start loop 1 at :",time.ctime())
    print("in1",in1)
    time.sleep(4)
    print("end loop 1 at: ",time.ctime())
def loop2(in1,in2):
    print("in1:",in1,"in2:",in2)
    print("start loop 2 at :",time.ctime())
    time.sleep(2)
    print("end loop 2 at: ",time.ctime())
def main():
	print("Staring at:",time.ctime())
	t1 =  threading.Thread(target = loop1,args = ("int1",))
	t1.start()
	t2 =  threading.Thread(target = loop1,args = ("int1","int2"))
	t2.start()
    print("all done at:",time.ctime())

if __name__ == '__main__':
    main()
    while True:
        time.sleep(1)

案例5

- #!/usr/bin/python
import time
#利用time函数，
import threading
# print ("time.time(): %s " %time.time())
# print (time.localtime( time.time() ))
# print (time.asctime( time.localtime(time.time()) ))
def loop1(in1):
    print("start loop 1 at :",time.ctime())
    print("in1",in1)
    time.sleep(4)
    print("end loop 1 at: ",time.ctime())
def loop2(in1,in2):
    print("in1:",in1,"in2:",in2)
    print("start loop 2 at :",time.ctime())
    time.sleep(2)
    print("end loop 2 at: ",time.ctime())

def main():
    print("Staring at:", time.ctime())
    t1 = threading.Thread(target=loop1, args=("int1",))
    t1.start()
    t2 = threading.Thread(target=loop2, args=("int1", "int2"))
    t2.start()
    print("all done at:",time.ctime())
    #就是多了两个JOIN()表示等待多线程执行完成.
    t1.join()
    t2.join

if __name__ == '__main__':
    main()
    while True:
        time.sleep(1)

案例6,没有主线程守护

import time
import threading

def fun():
		print("start fun")
		time.sleep()
		print("end fun")
print ("main thread")

t1 = threading.Thread(target = fun, args =() )
t1.start()
time.sleep(1)
print("main thread end")

案例7,守护线程

import time
import threading

def fun():
		print("start fun")
		time.sleep()
		print("end fun")
print ("main thread")

t1 = threading.Thread(target = fun, args =() )
t1.setDaemon(Ture)#这个线程对主线程进行了守护,如果主线程停止了,子线程也会跟着挂.
t1.start()
time.sleep(1)
print("main thread end")

案例8

import time
import threading
def loop1():
		print("start loop 1 at :",time.ctime())
		time.sleep(4)
		print("end loop 1 at :", time.ctime())
def loop2():
		print("start loop 2 at :",time.ctime())
		time.sleep(2)
		print("end loop 2  at :", time.ctime())
def loop3():
		print("start loop 3 at :",time.ctime())
		time.sleep(5)
		print("end loop 3 at :", time.ctime())
def main():
   		print("Starting at :", time.timectime())
		t1 = threading.Thread(target= loop1,args=())
		t1.setName("THR_1")
		t1.start()
		
		t2 = threading.Thread(target= loop2,args=())
		t2.setName("THR_2")
		t2.start()	print("Starting at :", time.timectime())
		
		t3 = threading.Thread(target= loop3,args=())
		t3.setName("THR_3")
		t3.start()
		time.sleep(3)
		#enumerate得到正在运行的子程序,即子线程1和子线程3
			for thr in threading.enumerat():
					pirnt("正在运行的子线程名字是:%S"%thr.getName())
			pirnt("正在运行的子线程名字是:%S"%threading.activeCount())
			print("all done at:",time.ctime())
if __name __ =="__main__":
		main()

案例09

案例10

```
工业风写法
```
import threading
from time import sleep, ctime

loop = [4,2]
class ThreadFunc:
		def __init__(self,name):
				self.name = name 
		def loop(self, nloop, nsec):
				print("Start loop", nloop, "at",ctime())
				sleep(nsec)
				print("Done loop", nloop,"at",ctime())
def main():
		print("Starting at:",ctime())
		t = ThreadFunc("loop")
		t1 = threading.Thread(target = t.loop, args = ("LOOP1",4))
		t2  = threading.Thread(target = ThreadFunc('loop').loop,args = ("LOOP2",2))
		t1.start()
		t2.start()
		t1.join()
		t2.join()

		print("ALL DONE AT:",ctime())
if __name__ = "__main__":
		main()