devfzc

class _const:
    class ConstError(TypeError): pass
    class ConstCaseError(ConstError): pass
        def __setattr__(self, name, value):
            if self.__dict__.has_key(name):
                raise self.ConstError, "Can't change const.%s" % name
            if not name.isupper():
                raise self.ConstCaseError, \
                    'const name "%s" is not all uppercase' % name
         self.__dict__[name] = value