多进程的调用(multiprocessing.Process)

Posted 2021-06-08 管控念头

import multiprocessing, time, os

# def pro(name):
#  print(\'hello\', name, time.ctime())
#
# if __name__ == \'__main__\':
#  l = []
#  for t in range(4):
#     t = multiprocessing.Process(target=pro, args=(\'alex\',))
#     t.start()
#     l.append(t)
#  for t in l:
#     t.join()
#  print(\'end...\')


# class MyProcess(multiprocessing.Process):
#  def __init__(self, city):
#     super(MyProcess, self).__init__()
#     self.city = city
#
#  def run(self):
#     \'\'\'继承同样重写run方法\'\'\'
#     print(\'hello\', self.name, time.ctime()) # self.name代表进程名MyProcess-1,MyProcess-2,MyProcess-3,MyProcess-4
#
# if __name__ == \'__main__\':
#  l = []
#  for t in range(4):
#     t = MyProcess(\'China\')
#     # t.daemon = True # 和线程不一样的是，进程是daemon且不是方法而是属性，直接赋值True就行
#     t.start()
#     l.append(t)
#  for t in l:
#     t.join()
#  print(\'end...\')


def info(title):
   print(\'title:\', title)
   print(\'父进程ID:\', os.getppid()) # os.getppid()所运行进程的父进程ID，主进程的父进程是pacharm程序
   print(\'该进程ID:\', os.getpid()) # os.getpid()所运行进程ID

def f(name):
   info(name)
   print(\'hello\', name)

if __name__ == \'__main__\':
   f(\'main process line\')
   time.sleep(1)
   p = multiprocessing.Process(target=f, args=(\'alex\',))
   p.start()
   p.join()