 <pre><code>class Parent1(object): def on_start(self): print('do something') class Parent2(object): def on_start(self): print('do something else') class Child(Parent1, Parent2): def on_start(self): super(Child, self).on_start() super(Parent1, self).on_start() c = Child() c.on_start() do something do something else </code></pre> <p>Or without super:</p> <pre><code>class Child(Parent1, Parent2): def on_start(self): Parent1.on_start(self) Parent2.on_start(self) </code></pre>