property.py

class Foo(object):
    def __init__(self, *names):
        self._d = {}
        for name in names:
            self.add_property(name, name)

    def add_property(self, name, default):
        self._d[name] = default
        if not hasattr(Foo, name):
            setattr(Foo, name, self._add_property(name))

    def _add_property(self, name):
        def getter(self):
            return "[[ {0} ]]".format(self._d.get(name, None))
        def setter(self, value):
            self._d[name] = str(value)
        return property(getter, setter)


foo = Foo("foo", "bar", "baz")

print foo.foo
print foo.bar
print foo.baz