如何将属性添加到Python3中带有dict的类的\uu init \uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu（）中的类？

Question

下面的代码在python2.7中使用_x.__dict__['c']=8

class _x:
    def __init__(self):
        self.a = 6
        self.b = 7
        _x.__dict__['c']=8
        print("good!")

y=_x()
print(y.__dict__)
print(_x.__dict__)

输出：

good!
{'a': 6, 'b': 7}
{'c': 8, '__module__': '__main__', '__doc__': None, '__init__': <function __init__ at 0x00000000049227B8>}

上面的代码在python3.6中不适用 _x.__dict__['c']=8并出现错误：

TypeError                             Traceback (most recent call last)
<ipython-input-5-b4146e87f5a4> in <module>()
      6         print("good!")
      7 
----> 8 y=_x()
      9 print(y.__dict__)
     10 print(_x.__dict__)

<ipython-input-5-b4146e87f5a4> in __init__(self)
      3         self.a = 6
      4         self.b = 7
----> 5         _x.__dict__['c']=8
      6         print("good!")
      7 

TypeError: 'mappingproxy' object does not support item assignment

有什么建议吗？你知道吗

Answer 1

可以通过在变量名之前指定类名来设置类变量。你知道吗

更改：

_x.__dict__['c']=8

收件人：

_x.c=8