How to create a class using variable number of variables in python

gistfile1.txt

There is a known method to emulate a container for variables, which support both methods of access: by a variable's name and a string key.

class Vars:
    def __init__(self, **kw):
        self.__dict__.update(kw)

    def __getitem__(self, key):
        return self.__dict__[key]

    def __setitem__(self, key, val):
        self.__dict__[key] = val

    def __contains__(self, name):
        return name in self.__dict__

    def __nonzero__(self):
        return bool(self.__dict__)

    def __iter__(self):
        return iter(self.__dict__)

    def __len__(self):
        return len(self.__dict__)

    def __copy__(self):
        return self.__class__(**self.__dict__)

    def __repr__(self):
        return 'Vars(' + ', '.join('%s=%r' % (k,v) for k,v in self.__dict__.items()) + ')'

>>> vars = Vars()
>>> vars.a = 1
>>> vars['b'] = 2
>>> print(vars)
Vars(a=1, b=2)
>>> print(vars['a'], vars.b)
1 2
>>> print(tuple(vars))
('a', 'b')