Python 有没有库是可以把字典像属性那样操作的？

看看老的 tornado 的代码, 记得最早的版本里封装了一个, 很简单, 十几行代码就搞定了

我的做法是，写个 class 设置__dict__ 为你的 dict

ObjectDict

class AttrDict(dict):
__getattr__ = dict.__getitem__
__setattr__ = dict.__setitem__

dict1 = AttrDict(dict_1)

dict1.a == 1

写了一个贼丑的
```Python

class Duck(dict):
def __init__(self, *args, **kw):
return super(Duck, self).__init__(self, *args, **kw)

def __getattr__(self, key):
try:
return self[key]
except KeyError as e:
print e

def __setattr__(self, *args, **kw):
object.__setattr__(self, *args, **kw)
for k, v in self.__dict__.items():
if k not in self.keys():
self[k] = v


if __name__ == "__main__":
s = Duck()
# as a dict
s['a'] = 1
print s.a
# set and get attribute
s.c = [1,3]
print s.c
print s['c']
```

pip install python-box

@bravecarrot
class FrozenDict:
def __new__(cls, arg):
if isinstance(arg, abc.Mapping):
return super().__new__(cls)
elif isinstance(arg, abc.MutableSequence):
return [cls(item) for item in arg]
else:
return arg

def __init__(self, mapping):
self.__data = {}
for key, val in mapping.items():
self.__data[key] = val

def __getattr__(self, name):
if hasattr(self.__data, name):
return getattr(self.__data, name)
else:
return FrozenDict(self.__data[name])

这我以前从书上学的，只读还行，要写入就要重写__setattr__ 不太会

@glasslion 这个强无敌

@jakeyfly 我觉得 @jatsz 的已经很强了

但是我的也能用呀（大笑）

@bravecarrot 大佬你这个好像不能读嵌套的呀，哈

@jatsz 大佬 你这是高端猴子补丁吗

秒变 JS

easydict

@jakeyfly
这个是挺猴的，记不得在哪里看到的，不过也不能解决嵌套问题。

在项目中使用的是这个版本，能解决嵌套的问题：

class AttrDict(dict):
"""
A class to convert a nested Dictionary into an object with key-values
that are accessible using attribute notation (AttrDict.attribute) instead of
key notation (Dict["key"]). This class recursively sets Dicts to objects,
allowing you to recurse down nested dicts (like: AttrDict.attr.attr)
"""

# Inspired by:
# http://stackoverflow.com/a/14620633/1551810
# http://databio.org/posts/python_AttributeDict.html

def __init__(self, iterable, **kwargs):
super(AttrDict, self).__init__(iterable, **kwargs)
for key, value in iterable.items():
if isinstance(value, dict):
self.__dict__[key] = AttrDict(value)
else:
self.__dict__[key] = value

@jatsz 嗯 我下了上面那位大佬的库 满好用的，我原先用递归的，经常出问题。还是用别人的轮子好~~~~~