ListEditor_demo.py fails with PySide

[pberkes]

The Standard_Editors/ListEditor_demo.py example runs with these backends

ETS_TOOLKIT=qt4 QT_API=pyqt python ListEditor_demo.py
ETS_TOOLKIT=wx python ListEditor_demo.py 

With pyside

ETS_TOOLKIT=qt4 QT_API=pyside python ListEditor_demo.py

clicking on the arrow buttons gives a traceback:

Traceback (most recent call last):
  File "/Users/pberkes/egit/meta-geophysics/meta-ETS/traitsui/traitsui/qt4/list_editor.py", line 280, in popup_menu
    proxy    = sender.proxy
AttributeError: 'NoneType' object has no attribute 'proxy'

[MatthieuDartiailh]

This behavior is reported as a known pitfall in Pyside and mentioned here http://qt-project.org/wiki/PySide_Pitfalls. I don't know if one can use the suggested trick to avoid that issue.

[corranwebster]

This appears to be fixed as of TraitsUI 5.1. Closing.