Nuke: Batch Edit Tool

batch_edit.py

import os
import difflib

import nuke
import nukescripts


class KnobsPanel(nukescripts.PythonPanel):
    def __init__(self, knobs):
        nukescripts.PythonPanel.__init__(self, 'KnobsPanel')
        self.knobs = knobs

    def knobChanged(self, knob):
        if isinstance(knob, nuke.File_Knob):
            v1 = self.knobs[knob.name()][0].value()
            v2 = knob.value()
            diff = difflib.unified_diff(v1, v2)
            orig = ''
            sub = ''
            for char in list(diff):
                if char[0] == ' ':
                    orig += char[1]
                    sub += char[1]
                if char[0] == '+':
                    sub += char[1]
                if char[0] == '-':
                    orig += char[1]
            orig = orig[4:-3]
            sub = sub[4:-3]

            for key in self.knobs:
                if key == knob.name():
                    for k in self.knobs[key]:
                        f = k.value().replace(orig, sub)
                        k.setValue(f)

            return

        for key in self.knobs:
            if key == knob.name():
                for k in self.knobs[key]:
                    if isinstance(k, nuke.Link_Knob):
                        k = k.getLinkedKnob()
                    k.setValue(knob.value())

def main():
    nodes = nuke.selectedNodes()
    
    knobs = {}
    for node in nodes:
        for k in node.knobs():
    
            knob = node.knobs()[k]
    
            if k in knobs:
                knobs[k].append(knob)
            else:
                knobs[k] = [knob]
    
    p = KnobsPanel(knobs)
    
    for k in knobs:
        knob = knobs[k][0]
        value = knobs[k][0].value()
    
        if isinstance(knob, nuke.Link_Knob):
            knob = knobs[k][0].getLinkedKnob()
            value = knob.value()
            new_knob = nuke.Array_Knob(k)
            new_knob.setValue(value)
            p.addKnob(new_knob)
            new_knob.setFlag(nuke.STARTLINE)
    
        if isinstance(knob, nuke.Boolean_Knob):
            new_knob = nuke.Boolean_Knob(k)
            new_knob.setValue(value)
            p.addKnob(new_knob)
            new_knob.setFlag(nuke.STARTLINE)
    
        if isinstance(knob, nuke.Int_Knob):
            new_knob = nuke.Int_Knob(k)
            new_knob.setValue(value)
            p.addKnob(new_knob)
            new_knob.setFlag(nuke.STARTLINE)
    
        if isinstance(knob, nuke.Enumeration_Knob):
            new_knob = nuke.Enumeration_Knob(k, k, knobs[k][0].values())
            new_knob.setValue(value)
            p.addKnob(new_knob)
            new_knob.setFlag(nuke.STARTLINE)
    
        if isinstance(knob, nuke.File_Knob):
            new_knob = nuke.File_Knob(k)
            new_knob.setValue(value)
            p.addKnob(new_knob)
            new_knob.setFlag(nuke.STARTLINE)
    
    
    p.showModalDialog()