Select nodes of the same class.

• Select a node
• Edit -> Select similar

• All nodes of the selected type will be selected in the Node Graph .

• Copy 'selectSimilar' folder in your .Natron folder.
• Add following lines to your 'initGui.py' file, where <path> is the location of 'selectSimilar' folder.

from <path>.selectSimilar.selectSimilar import *
NatronGui.natron.addMenuCommand('Edit/Select similar','selectSimilar')