进程跟现程

1 import os 2 if __name__=='__main__': 3 4 print( 'presses (%s) start....'%(os.getpid())) 5 6 pid=os.fork() 7 if pid<0: 8 print('fork in error') 9 elif pid==0: 10 11 print('子(%s) 父(%s)'%(os.getpid(),os.getppid())) 12 print(os.getppid()) 13 else : 14 print('父线程(%s)创建子线程(%s)'%(os.getpid(),pid)) View Code

 

1 print("This is console module") 2 import os 3 from multiprocessing import Process 4 def run_proc(name): 5 print('child process %s (%s) running'%(name,os.getpid())) 6 if __name__=='__main__': 7 print('parent process %s'%os.getpid()) 8 for i in range(5): 9 p=Process(target=run_proc,args=(str(i),)) 10 print('process will start') 11 p.start() 12 p.join() 13 print('process end') View Code

 多进程Pool

1 print("This is console module") 2 from multiprocessing import Pool 3 import os,random,time 4 5 def run_task(name): 6 print('task %s (pid=%s) running...'%(name,os.getpid())) 7 time.sleep(random.random()*3) 8 print('task %s end'%name) 9 if __name__=='__main__': 10 print('current process %s'%os.getpid()) 11 p=Pool(processes=3) 12 for i in range(5): 13 p.apply_async(run_task,args=(i,)) 14 print('waiting for subprocessing done...') 15 p.close() 16 p.join() 17 print('all subprocess done') View Code

 

转载于:https://www.cnblogs.com/futheworld/p/9440500.html

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