A free dict as a property container

data.py

class Data(dict):
    def __init__(self, *args, **kwargs):
        super(Data, self).__init__(*args, **kwargs)
        self.__dict__ = self

how_to_use.py

a = Data()

a = Data(name="Tom", age=17)

print a
# -> {'age': 17, 'name': 'Tom'}

a.sex = "male"

print a
# -> {'age': 17, 'name': 'Tom', 'sex': 'male'}

wrong.py

d = Data(name="Foo")
print d.items()
# -> ...

d.items = "Bar"

print d.items()
# ops!