setComment.py

# --------------------------------------------------------------
#  setComment.py
#  Version: 1.0.0
#  Last Updated: January 11th, 2018
# --------------------------------------------------------------


# --------------------------------------------------------------
#  USAGE:
#
#  Sets Meta+C shortcut to change a node's label
#  Add this to your menu.py
# --------------------------------------------------------------


def setComment():
    selectedNode = nuke.selectedNode()
    oldComment = selectedNode.knob('label').value()
    newComment = nuke.getInput('Node comment',oldComment)

    # If the user has hit 'Cancel', use the previous comment rather than wiping it
    if newComment == None:
        selectedNode.knob('label').setValue(oldComment)
    else:
        selectedNode.knob('label').setValue(newComment)

# Add to edit menu
nuke.menu('Nuke').addCommand( 'Edit/Set Node Label', setComment, "meta+c")