The documentation seems to claim[1] otherwise: It also allows the direct binding of events to: * A handler method in the same or another object. * A

The documentation seems to claim[1] otherwise: It also allows the direct binding of events to: * A handler method in the same or another object. * An ordinary function like a static method or a global function. * An arbitrary callable object. If it works for arbitrary callable objects it should certainly work for closures. [1] https://docs.wxpython.org/events_overview.html https://docs.wxpython.org/events_overview.html