Python实现多进程共享数据的方法分析

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# -*- coding:utf-8 -*-
from multiprocessing import Process, Manager
import time
import random
def kkk(a_list, number):
  for i in range(10):
    a_list.append(i)
    time.sleep(random.randrange(2))
    print('这是进程{} {}'.format(number, a_list))
  print('这是进程{} {}'.format(number, a_list))
def jjj(a_list):
  for i in range(2):
    process = Process(target=kkk, args=(a_list, i))
    process.start()
if __name__ == '__main__':
  a_list = []
  process_0 = Process(target=jjj, args=(a_list,))
  process_0.start()
  process_0.join()
  print(a_list)
  print(len(a_list))
  print('it\'s ok')

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这是进程0 [0]
这是进程0 [0, 1]
这是进程0 [0, 1, 2]
这是进程0 [0, 1, 2, 3]
这是进程1 [0]
这是进程0 [0, 1, 2, 3, 4]
这是进程1 [0, 1]
这是进程0 [0, 1, 2, 3, 4, 5]
这是进程1 [0, 1, 2]
这是进程1 [0, 1, 2, 3]
这是进程1 [0, 1, 2, 3, 4]
这是进程1 [0, 1, 2, 3, 4, 5]
这是进程0 [0, 1, 2, 3, 4, 5, 6]
这是进程0 [0, 1, 2, 3, 4, 5, 6, 7]
这是进程0 [0, 1, 2, 3, 4, 5, 6, 7, 8]
这是进程1 [0, 1, 2, 3, 4, 5, 6]
这是进程0 [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
这是进程0 [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
这是进程1 [0, 1, 2, 3, 4, 5, 6, 7]
这是进程1 [0, 1, 2, 3, 4, 5, 6, 7, 8]
这是进程1 [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
这是进程1 [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
[]
0
it's ok
Process finished with exit code 0

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# -*- coding:utf-8 -*-
from multiprocessing import Process, Manager
import time
import random
def kkk(a_list, number):
  for i in range(10):
    a_list.append(i)
    time.sleep(random.randrange(2))
    print('这是进程{} {}'.format(number, a_list))
  print('这是进程{} {}'.format(number, a_list))
def jjj(a_list):
  for i in range(2):
    process = Process(target=kkk, args=(a_list, i))
    process.start()
if __name__ == '__main__':
  manager = Manager()
  a_list = manager.list()
  # a_list = []
  process_0 = Process(target=jjj, args=(a_list,))
  process_0.start()
  process_0.join()
  print(a_list)
  print(len(a_list))
  print('it\'s ok')

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这是进程0 [0, 0]
这是进程0 [0, 0, 1]
这是进程0 [0, 0, 1, 2]
这是进程0 [0, 0, 1, 2, 3]
这是进程0 [0, 0, 1, 2, 3, 4]
这是进程1 [0, 0, 1, 2, 3, 4, 5]
这是进程0 [0, 0, 1, 2, 3, 4, 5, 1]
这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6]
这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2]
这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3]
这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4]
这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5]
这是进程0 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6]
这是进程0 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7]
这是进程0 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7, 8]
这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7, 8, 9]
这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7, 8, 9, 7]
这是进程0 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7, 8, 9, 7, 8]
这是进程0 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7, 8, 9, 7, 8]
这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7, 8, 9, 7, 8]
这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7, 8, 9, 7, 8, 9]
这是进程1 [0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7, 8, 9, 7, 8, 9]
[0, 0, 1, 2, 3, 4, 5, 1, 6, 2, 3, 4, 5, 6, 7, 8, 9, 7, 8, 9]
20
it's ok
Process finished with exit code 0