这个答案摘自Luciano Ramalho的《流利的Python》一书。这要归功于那个家伙。

class AttrDict:
    """A read-only façade for navigating a JSON-like object
    using attribute notation
    """

    def __init__(self, mapping):
        self._data = dict(mapping)

    def __getattr__(self, name):
        if hasattr(self._data, name):
            return getattr(self._data, name)
        else:
            return AttrDict.build(self._data[name])

    @classmethod
    def build(cls, obj):
        if isinstance(obj, Mapping):
            return cls(obj)
        elif isinstance(obj, MutableSequence):
            return [cls.build(item) for item in obj]
        else:
            return obj

in the init we are taking the dict and making it a dictionary. when getattr is used we try to get the attribute from the dict if the dict already has that attribute. or else we are passing the argument to a class method called build. now build does the intresting thing. if the object is dict or a mapping like that, the that object is made an attr dict itself. if it's a sequence like list, it's passed to the build function we r on right now. if it's anythin else, like str or int. return the object itself.

很抱歉再添加一个，但这一个解决了subdicts和纠正AttributeError，尽管非常简单:

class DotDict(dict):
    def __init__(self, d: dict = {}):
        super().__init__()
        for key, value in d.items():
            self[key] = DotDict(value) if type(value) is dict else value
    
    def __getattr__(self, key):
        if key in self:
            return self[key]
        raise AttributeError(key) #Set proper exception, not KeyError

    __setattr__ = dict.__setitem__
    __delattr__ = dict.__delitem__

最简单的方法是定义一个类，我们称之为Namespace。在字典上使用对象dict.update()。然后，字典将被视为一个对象。

class Namespace(object):
    '''
    helps referencing object in a dictionary as dict.key instead of dict['key']
    '''
    def __init__(self, adict):
        self.__dict__.update(adict)



Person = Namespace({'name': 'ahmed',
                     'age': 30}) #--> added for edge_cls


print(Person.name)

你可以用我刚做的这个类来做。对于这个类，您可以像使用另一个字典(包括json序列化)一样使用Map对象，或者使用点表示法。希望对你有所帮助:

class Map(dict):
    """
    Example:
    m = Map({'first_name': 'Eduardo'}, last_name='Pool', age=24, sports=['Soccer'])
    """
    def __init__(self, *args, **kwargs):
        super(Map, self).__init__(*args, **kwargs)
        for arg in args:
            if isinstance(arg, dict):
                for k, v in arg.iteritems():
                    self[k] = v

        if kwargs:
            for k, v in kwargs.iteritems():
                self[k] = v

    def __getattr__(self, attr):
        return self.get(attr)

    def __setattr__(self, key, value):
        self.__setitem__(key, value)

    def __setitem__(self, key, value):
        super(Map, self).__setitem__(key, value)
        self.__dict__.update({key: value})

    def __delattr__(self, item):
        self.__delitem__(item)

    def __delitem__(self, key):
        super(Map, self).__delitem__(key)
        del self.__dict__[key]

使用例子:

m = Map({'first_name': 'Eduardo'}, last_name='Pool', age=24, sports=['Soccer'])
# Add new key
m.new_key = 'Hello world!'
print m.new_key
print m['new_key']
# Update values
m.new_key = 'Yay!'
# Or
m['new_key'] = 'Yay!'
# Delete key
del m.new_key
# Or
del m['new_key']

class AttrDict(dict):

     def __init__(self):
           self.__dict__ = self

if __name__ == '____main__':

     d = AttrDict()
     d['ray'] = 'hope'
     d.sun = 'shine'  >>> Now we can use this . notation
     print d['ray']
     print d.sun

如果使用数组表示法，则可以将所有合法字符串字符作为键的一部分。 例如，obj['!#$%^&*()_']