Python 检查对象是 ListProxy 还是 DictProxy

Question

我正在 python 中使用多处理模块，并使用 mp 管理器提供的共享变量列表和字典。

import multiprocessing as mp    
a = mp.Manager()

b = a.list()
b
<ListProxy object, typeid 'list' at 0x14098207908>

c = a.dict()
c
<DictProxy object, typeid 'dict' at 0x140984579c8>

我想做:

if isinstance(b, ListProxy):
    do something
elif isinstance(c, DictProxy):
    do something else

但是这些似乎不是内置类型，我尝试根据基本列表和字典类型检查它们，但它们显然不起作用

如何在代码中测试这些类型？

Answer 1

试试这个。

import multiprocessing as mp

def judge(x):
    if isinstance(x, mp.managers.ListProxy):
        print('It is a ListProxy.')
    elif isinstance(x, mp.managers.DictProxy):
        print('It is a DictProxy.')
    else:
        pass
    pass

def main():
    a = mp.Manager()
    b = a.list()
    c = a.dict()
    judge(b)
    judge(c)
    pass

if __name__ == '__main__':
    main()
    pass