Issue with multiple inheritance of Eto.Forms.Dialog with py3 in rhino8

Hi there,

I am trying to port my rhinoscripts from ironPython2.7 to python3 in rhino8. I often use a mechanism that inherits multiple parent classes to combine Eto.Forms.Dialog and Eto.Forms.Form.

When I run the script below in python3, I expect the “SampleEtoRoomNumberDialog” to inherit the method “OnOKButtonClick” from ParentDialog, but instead I get the error message:

AttributeError: ‘0, Culture=neutral, PublicKeyToken=7cec85d7bea77’ object has no attribute ‘OnOKButtonClick’

(The script works fine in Rhin8 / IronPython2.7)

Can anyone please help me out?

Thanks!
Tim

# Imports
import Rhino
from Eto import Forms as forms

class ParentDialog(object):
    # OK button click handler
    def OnOKButtonClick(self, sender, e):
        self.Close(True)
 

# SampleEtoRoomNumber dialog class
class SampleEtoRoomNumberDialog(forms.Dialog[bool], ParentDialog):
 
    # Dialog box Class initializer
    def __init__(self):
        super(SampleEtoRoomNumberDialog, self).__init__()

        # Create the default button
        self.DefaultButton = forms.Button()
        self.DefaultButton.Text = 'OK'
        self.DefaultButton.Click += self.OnOKButtonClick
 
        # Create a table layout and add all the controls
        layout = forms.DynamicLayout()
        layout.AddRow(self.DefaultButton)
 
        # Set the dialog content
        self.Content = layout

 
def main():
    dialog = SampleEtoRoomNumberDialog();
    rc = dialog.ShowModal(Rhino.UI.RhinoEtoApp.MainWindow)

if __name__ == "__main__":
    main()

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