PyQGIS: hide a layers-group by uncheking it in the legend [duplicate]

Question

I have a group of layers that contain itself other groups (as shown in picture).

I need to hide one group by uncheking the checkbox in the legend.

is there any way to do it programatically using python?

Answer 1

For QGIS 3.x, you can use:

treeLayer = QgsProject.instance().layerTreeRoot().findLayer(layer.id())
if treeLayer:
  treeLayer .setItemVisibilityChecked(False)

Answer 2

to set invisible :

QgsProject.instance().layerTreeRoot().findGroup(group_inter.name()).setVisible(0)

to set visibe :

QgsProject.instance().layerTreeRoot().findGroup(group_inter.name()).setVisible(2)

because

Qt::Unchecked            0  
Qt::PartiallyChecked     1 (some children are checked and some are not) 
Qt::Checked              2