Seeing as I’ve found very little reference for the use of python in nuke on the web I thought I’d create this post and add to it with little code snippets.
If anyone has some cool snippets to share please feel free to leave them in a comment below.
disable “postage stamps” on only “Read” nodes
for a in nuke.allNodes(): if a.Class()=='Read': a['postage_stamp'].setValue(0)
disable “postage stamps” on all nodes
for a in nuke.allNodes(): try: a['postage_stamp'].setValue(0) except: pass
“unhide” all nodes’ inputs – useful when receiving a sneaky comp/lighting script
for a in nuke.allNodes(): try: a['hide_input'].setValue(0) except: pass
change the “first” frame of all selected nodes that are “Read” nodes:
(example changes the first frame to 1018)
for a in nuke.selectedNodes(): if a.Class() == 'Read': a['first'].setValue(1018)
print a selected nodes’ methods
import struct node = nuke.selectedNode() for a in node['lookup'].animations(): print dir(a)
print inputs (dependencies) of a selected node:
for a in nuke.selectedNode().dependencies(): print a.name()
print outputs (dependents) of a selected node:
for a in nuke.selectedNode().dependent(): print a.name()
find all the TimeOffset nodes in a Group called “Group2″, and change the value of each offset based on it’s position in the array of found time offsets
tos = [] for a in nuke.toNode('Group2').nodes(): if a.Class()=='TimeOffset': tos.append(a) for b in tos: b['time_offset'].setValue(tos.index(b))
set the ‘bbox’ for any selected Merge, Keymix & Copy nodes to “B”
for a in nuke.selectedNodes(): classTypes = ['Merge' , 'Keymix', 'Copy', ] for n in classTypes: if n in a.Class(): for p in a['bbox'].values(): if 'B' in p: a['bbox'].setValue(a['bbox'].values().index(p))
remove all animation from a selected nodes
for a in nuke.selectedNode().knobs(): nuke.selectedNode()[a].clearAnimated()
add keyframes – animate a mix
for a in nuke.selectedNodes(): a['mix'].setAnimated() a['mix'].setValueAt(1,nuke.frame()) a['mix'].setValueAt(0,(nuke.frame() - 1))
half the colour value of all the Constant nodes in a script
for a in nuke.allNodes(): if a.Class() == "Constant": a['color'].setValue(a['color'].value()[0] / 2 , 0) a['color'].setValue(a['color'].value()[1] / 2 , 1) a['color'].setValue(a['color'].value()[2] / 2 , 2)
find all the transform nodes in a script, and if their input is a Crop, set the ‘scale’ value to be twice it’s current value (also checks if the scale is a list/array or a float)
for a in nuke.allNodes(): if a.Class() == "Transform": if a.input(0).Class() == "Crop": x = a['scale'].value() if type(x).__name__ == 'list': a['scale'].setValue(x[0] * 2 , 0) a['scale'].setValue(x[1] * 2 , 1) if type(x).__name__ == 'float': a['scale'].setValue(x*2)
set all the gain values of all ColorCorrect nodes to be twice their current value
for a in nuke.allNodes(): if a.Class() == "ColorCorrect": a['gain'].setValue(a['gain'].value() * 2)
print files with ‘mov’ in filename
for a in nuke.allNodes(): if 'Read' in a['name'].value(): if 'mov' in a['file'].value(): print a['file'].value()
change font size of all “write” nodes in script
for a in nuke.selectedNodes(): if "Write" in a['name'].value(): a['note_font_size'].setValue(60)
create 20 constants with incrementing colour values
def makeConstants(amount): for i in range(amount): a= nuke.nodes.Constant() color= float( float(i) / float(amount) ) a['color'].setValue(color) makeConstants(20)
change the name of all Text nodes to contents the text “message”
for a in nuke.allNodes(): if a.Class()=='Text': a.setName(a['message'].value())
