python Manager 之dict KeyError问题的解决

程序需要多进程见共享内存，使用了Manager的dict。

最初代码如下：

from multiprocessing import Process, Manager
d = Manager().dict()
d2 = {}

def f():
 d['a1'] = {}
<span style="color:#ff6666;">  d['a1']['a2'] = 11</span>
 print d['a1']['a2']

if __name__ == '__main__':
 p = Process(target=f)
 p.start()
 p.join()

结果报错：

 print d['a1']['a2']
KeyError: 'a2'

解决方案：

from multiprocessing import Process, Manager
d = Manager().dict()
d2 = {}

def f():
 d['a1'] = {}
<span style="color:#ff6666;">  d2['a2'] = 11
 d['a1'] = d2</span>
 print d['a1']['a2']

if __name__ == '__main__':
 p = Process(target=f)
 p.start()
 p.join()

来源：https://blog.csdn.net/leiting_imecas/article/details/52778953