Python用にRubyのHashie::Mashっぽいの

mash.py

class mash(object):
    def __init__(self, dic={}):
        dic = {str(k): v if v.__class__ != dict else mash(v) for (k, v) in dic.items()}
        super(mash, self).__setattr__('_dic', dic)

    #self.name
    def __getattr__(self, name):
        return self._dic[name]

    #self.name = value
    def __setattr__(self, name, value):
        self._dic[str(name)] = value

    #item in self
    def __contains__(self, item):
        return item in self._dic

    #str(self)
    def __str__(self):
        return 'Mash:' + self._dic.__str__()

    #repr(self)
    def __repr__(self):
        return 'mash(' + self._dic.__repr__() + ')'

    def todict(self):
        return {k: v if v.__class__ != mash else v.todict() for (k, v) in self._dic.items()}

result.txt

>>> import mash
>>> m = mash.mash()
>>> m.value = 1
>>> m.value
1
>>> m.todict()
{'value': 1}
>>> 'value' in m
True
>>> 'id' in m
False
>>> m = mash.mash({'id':1024})
>>> m.id
1024
>>> 'value' in m
False
>>> 'id' in m
True
>>> m = mash.mash({'user':{'name':'John'}})
>>> m.user.name
'John'

test.py

from mash import mash
import unittest

class mashtest(unittest.TestCase):

    def test_set(self):
        m = mash()
        m.v = True
        self.assertTrue(m.v)
        m.m = mash()
        m.m.v = True
        self.assertTrue(m.m.v)

    def test_dict(self):
        d = {'name':'John','sex':'male','age':19}
        m = mash(d)
        self.assertEqual(m.name, 'John')
        self.assertEqual(m.sex, 'male')
        self.assertEqual(m.age, 19)
        self.assertEqual(m.todict(), d)
        d = {'type':'event','value':{'id':1111,'text':'Everything is OK:)'}}
        m = mash(d)
        self.assertEqual(m.type, 'event')
        self.assertEqual(m.value.id, 1111)
        self.assertEqual(m.value.text, d['value']['text'])
        self.assertEqual(m.todict(), d)
        self.assertEqual(m, mash(m.todict()))

unittest.main()

setattrをオーバーライドしているためself._dic = {}により__setattr__が呼ばれ無限ループするっぽ
super呼び出しに書き換える