Select feature one by one not working in pyQGIS?

I have used following code for selecting the features one by one. but when i run the script it is just selecting last feature and zoom it. I want to select each feature and zoom it.

def SelectFeatures(self):
    layer = self.iface.activeLayer();
    iter = layer.getFeatures();
    for feature in iter:
        geom = feature.geometry()
        self.iface.mapCanvas().setSelectionColor(QColor("yellow"));
        layer.setSelectedFeatures([feature.id()])
        selected_features = layer.selectedFeatures()
        self.iface.mapCanvas().zoomToSelected( layer )

        self.iface.mapCanvas().refresh()