The method of process or other properties of the object

#join方法
import time, os
from multiprocessing import Process
def task(name, n):
 print('%s is running'%name)
 time.sleep(n)
if __name__ =='__main__':
 start = time.time()
 p1 = Process(target=task, args=('子进程1',5))
 p2 = Process(target=task, args=('子进程2',3))
 p3 = Process(target=task, args=('子进程3',2))
 p1.start()
 p2.start()
 p3.start()
 p1.join() The method of this write time is not # cumulative time (serial) 
p2.join () 
p3.join () 
 Print ( 'primary' , the time.time () - Start) 
 Print (p1.pid) 
 Print (p2.pid) 
 Print (p3.pid) 



Import Time , OS 
from multiprocessing Import Process 
DEF Task (name , n-): 
 Print ( '% S running IS' name%) 
the time.sleep (n-) 
IF the __name__ == '__main__': 
Start Time =. Time () 
P1 = process ( target = Task , args = ( 'sub-process. 1' , . 5)) 
P2 = process ( target = Task , args = ( 'sub-process 2' , . 3)) 
P3 = process (= Task target , args = ( 'sub-process 3' , 2)) 
p1.start () # This method will write the cumulative time (serial) 
p1.join () 
p2.start () 
p2.join () 
p3.start () 
p3.join () 
 Print ( 'primary' , the time.time () - Start) 
 Print (p1.pid) 
 Print (p2.pid) 
 Print (p3.pid) 



Import Time , OS 
from multiprocessing Import Process 
DEF Task ( name , n-): 
 Print ( '% S running IS' name%) 
the time.sleep (n-) 
IF the __name__ == '__main__': 
Start the time.time = () 
P1 = Process ( target = Task , args = ( 'sub process 1 ', . 5)) 
P2 = Process ( target = Task , args = ( 'sub-process 2' , . 3)) 
P3 = Process ( target = Task , args = ( 'sub-process. 3' , 2)) 
P_L = [P1 , P2 , P3] 
 for P in P_L: 
p.start () 
 for P in P_L: 
p.join () 
 Print ( 'primary' , the time.time () - Start) 
 Print (p1.pid) 
 Print (p2.pid) 
 Print (p3.pid) 
# is_alive understand the process of determining whether the survival of 
Import Time , os 
from multiprocessing Import process 
DEF Task (name): 
 Print ( '% S IS running'% name)
 time.sleep(3)
if __name__ =='__main__':
 start = time.time()
 p1 = Process(target=task, args=('子进程1',))
 p1.start() #此方法写会累计时间（串行）
 print(p1.is_alive())
 p1.join()
 print('主', time.time() - start)
 print(p1.pid)
 print(p1.is_alive())


import time, os
from multiprocessing import Process
def task(name):
 print('%s is running'%name)
 time.sleep(3)
if __name__ =='__main__':
 p = Process(target=task, name = 'My name is the process' , args = ( 'child process' ,)) 
p.start () # start the process (just send a command to the operating system is not executed successfully) 
p.join () # Wait for the process to perform successfully 
p.terminate () # kill process Print (p.is_alive ()) # determine whether the process alive Print (p.name) # view the process name