join方法

from multiprocessing import Process
import time
def work(name):
print('task <%s> is runing' %name)
time.sleep(3)
print('task <%s> is done' % name)

if __name__ == '__main__':
p1=Process(target=work,args=('egon',))
p2=Process(target=work,args=('alex',))
p3=Process(target=work,args=('yuanhao',))

# p1.start()
# p2.start()
# p3.start()
#
# p1.join() #主进程等，等待p1运行结束
# p2.join() #主进程等，等待p2运行结束
# p3.join() #主进程等，等待p3运行结束

p_l = [p1, p2, p3]
for p in p_l:
p.start()

for p in p_l:
p.join()

print('主')

# p_l = [p1, p2, p3]
# for p in p_l:
# p.start()
# p.join()
# p1.start()
# p1.join()
# p2.start()
# p2.join()
# p3.start()
# p3.join()

# print('主')