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copied!<p>Creating C++ virtual functions that can be overridden in Python requires some work - see <a href="http://www.boost.org/doc/libs/1_42_0/libs/python/doc/tutorial/doc/html/python/exposing.html#python.class_virtual_functions" rel="nofollow noreferrer">here</a>. You will need to create a wrapper function in a derived class that calls the Python method. Here is how it can work:</p> <pre><code>struct ConnectionBaseWrap : ConnectionBase, wrapper<ConnectionBase> { void OnEvent(const Overload_a &obj) { if (override f = get_override("OnEventOverloadA")) f(obj); } void OnEvent(const Overload_b &obj) { if (override f = get_override("OnEventOverloadB")) f(obj); } }; BOOST_PYTHON_MODULE(yourmodule) { class_<ConnectionBaseWrap, boost::noncopyable>("ConnectionBase") //Your additional definitions here. ; } </code></pre> <p>Some notes:</p> <ul> <li><p>Since you won't be calling the base class's OnEvent function from Python, you don't need to define it with <code>.def</code>. If you did want to define it, you'd need to give the two overloaded versions different names, like <a href="http://www.boost.org/doc/libs/1_42_0/libs/python/doc/tutorial/doc/html/python/functions.html#python.overloading" rel="nofollow noreferrer">here.</a></p></li> <li><p>The two overloads will call different Python methods: <code>OnEventOverloadA</code> and <code>OnEventOverloadB</code>. Another option is to have them both call the same method <code>OnEvent</code>, and then one Python method will override both overloads.</p></li> </ul>

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