CheckListCtrlMixin broken in wxPython 4.1.0?

I’m in the process of migrating to wxPython 4.1.0 and python 3.7 64-bit from wxPython and python 2.7 32-bit. I’m currently doing parallel testing on Windows 10 and MacOS 10.15 Catalina.

The CheckListCtrlMixin appears to be broken. in the wxPython Demo, the CheckListCtrlMixin does not appear to work on Windows or MacOS, complaining there are not enough parameters for the “CheckItem” method. If I fix this in the code, the checkboxes still do not function. This is the same problem I see in my own code, no way to check the checkboxes.


See wxPython4.1.0, demo CheckListCtrl error