gistfile1.py

class Widget(object):
    @classmethod
    def from_config(cls, config):
        widget = cls()

        # configure general widget stuff here
        widget.name = slugify(config['name'])

        return widget

class GraphiteWidget(Widget):
    @classmethod
    def from_config(cls, config):
        widget = super(GraphiteWidget, cls).from_config(config)
        widget.graphite_url = config[

        # configure general graphite widget stuff here
        # ...

        return widget

class GraphWidget(GraphWidget):
    @classmethod
    def from_config(cls, config):
        widget = super(GraphWidget, cls).from_config(config)
        widget.graphite_url = config[

        # configure graph widget stuff here
        # ...

        return widget