多进程

多进程
 import multiprocessing,time,threading
 start_time=time.time()
 
 def thread_run():
     print(threading.get_ident()) #获取线程号
 def run(name):
     time.sleep(2)
     print('hello',name)
     t=threading.Thread(target=thread_run,)
     t.start()
 
 if __name__=="__main__":
     t_objs=[]
     for i in range(10):
         p=multiprocessing.Process(target=run,args=("bob %s"%i,))
         p.start()
         t_objs.append(p)
         #p.join()
     for p in t_objs:
         p.join()
     print("runing time:",time.time()-start_time)

获取进程号
 from multiprocessing import Process
 import os
 
 def info(title):
     print(title)
     print('module name:', __name__)
     print('parent process:', os.getppid()) #父进程
     print('process id:', os.getpid()) #自己进程
     print("\n\n")
 
 def f(name):
     info('\033[31;1mcalled from child process function f\033[0m')
     print('hello', name)
 
 if __name__ == '__main__':
     info('\033[32;1mmain process line\033[0m')
     p = Process(target=f, args=('bob',)) #定义子进程 每一个子进程都是由父进程启动的
     p.start()
     #p.join()