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With this code on a vectorLayer v_layer:

QObject.connect(v_layer, SIGNAL("layerModified()"), self.interceptModify)

I can intercept when a geometry is changed, but how do i find which feature has been changed?

I need to find the modified feature id, but layerModified signal has not parameter

i tryed with

QObject.connect(v_layer, SIGNAL("geometryChanged(QgsFeatureId, QgsGeometry)"), self.interceptEditingModify)

no error, but the signal is not emitted by qgis

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    geometryChanged: The new Style def test(fid, geometry): ... iface.activeLayer().geometryChanged.connect(test) seems to work. Don't know how to write it old style.
    – Redoute
    Commented Sep 20, 2017 at 19:18
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    Just don't use old style connects - there's absolutely no reason to choose them over the new style.
    – ndawson
    Commented Sep 20, 2017 at 23:15
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    Please don't add "SOLVED:" to the topic title. Instead, use the Answer section below for a self-answer, for the benefit of future visitors: meta.stackexchange.com/questions/116101/…
    – AndreJ
    Commented Sep 21, 2017 at 11:26

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