deep dict class

deep_dict.py

# -*- coding: utf-8 -*-
class deep_dict(dict):
    def __init__(self, value=None):
        if isinstance(value, dict):
             for key in value:
                self.__setitem__(
                    key,
                    deep_dict(value[key]) if isinstance(value[key], dict) else value[key]
                )
        else:
            raise TypeError, 'expected dict'


    def get(self, key, value=None):
        d = super(deep_dict, self)
        if '.' not in key:
            return d.get(key, value)

        my_key, rest = key.split('.', 1)
        target = d.get(my_key, value)

        return target.get(rest, value) if isinstance(target, deep_dict) else target


d = deep_dict({ 'foo': { 'bar': 'baz', 'foo': 1, 'b': { 'a': 2 } } })
print d.get('foo.bar')
print d.get('foo.foo')
print d.get('foo.foo2', 300)
print d.get('foo.b.a')
print d.get('foo.b.b')