How to Enable/Disable Topological Editing Programatically

Question

Is there a way to enable or disable topological editing with python in QGIS? I'm trying to set a bunch of rules, one of them being the editing, when starting up a project, but I can't seem to find how to enable this. For that matter, there's even no

iface.SnapppingToolBar()

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Answer 1

You can do the following to enable snapping and then topological editing (it happens at QgsProject level):

new_conf = QgsSnappingConfig(QgsProject.instance().snappingConfig())
new_conf.setEnabled(True)
QgsProject.instance().setSnappingConfig(new_conf)
QgsProject.instance().setTopologicalEditing(True)

You may also look at this related question How to enable/disable snapping functionality with PyQGIS? that mention QgsSnappingUtils class to ease manipulation of snapping editing configuration