standalone application

[baugetfa]

• a workflow exported with a node marked as user application
• run the app.py with python
• in tab "user applications" click the button "Widget"
• get error AttributeError: 'GraphOperator' object has no attribute 'vertex_open'

And indeed, GraphOperator has no vertex_open. See line 165 in src/openalea/visualea/compositenode_widget.py

What was the purpose of it