def add_class(self, name, out):
        code = """
        %(name)s = property(lambda self: get_class('%(name)s'))
        """%locals()
        out.write(self.indent.format(code))
Add a tvtk class with name, `name` as a property to the
dataset/ETHPy150Open enthought/mayavi/tvtk/special_gen.py/HelperGenerator.add_class