def create_node(this_node=''):
if not this_node: this_node = nuke.thisNode()
if this_node["customRange"].getValue():
this_node["frameStart"].setValue(
int(nuke.Root()['first_frame'].getValue()))
this_node["frameEnd"].setValue(
int(nuke.Root()['last_frame'].getValue()))
this_node["resolutionX"].setValue(this_node.width())
this_node["resolutionY"].setValue(this_node.height())
fileName = os.path.basename(nuke.root().name()).split(".")[0]
renderPath = os.path.dirname(os.path.dirname(
nuke.root().name())) + "/{render}/{file}/exr/{file}.%04d.exr".format(
render=Tank().data['rules']['STATUS']['render'], file=fileName)
renderPath = renderPath.replace('\\', '/')
# this_node["rootPath"].setValue(renderPath)
this_node["exrPath"].setValue(renderPath)
this_node["jpgPath"].setValue(renderPath.replace("exr", "jpg"))
this_node["tifPath"].setValue(renderPath.replace("exr", "tif"))
def process(self, context):
import nuke
fname = context.data["originMaking"]
if all(result["success"] for result in context.data["results"]):
self.log.info("Publish succeed, save script back to workfile.")
nuke.scriptSaveAs(fname, overwrite=True)
modified = False
else:
# Mark failed if error raised during extraction or integration
publishing = context.data["currentMaking"]
script_dir, file_name = os.path.split(publishing)
file_name = "__failed." + file_name
modified = True
os.rename(publishing, script_dir + "/" + file_name)
nuke.Root()["name"].setValue(fname)
nuke.Root()["project_directory"].setValue(os.path.dirname(fname))
nuke.Root().setModified(modified)
def run(cls, nodes=None, bake_list=None, pause=None):
"""
Once the nodes are gathered up then we can iterate over them
and execute each knob on the tab from the top to the bottom.
Args:
nodes (list): Un-sorted nodes either a selection in Nuke.
bake_list (list): List of nodes to be processed, these
have already been gathered and sorted.
pause (int): The queue order which you want to stop at.
Returns:
list: all the nodes which were executed successfully.
"""
# any nuke script can add a __template_class_text knob to its
# root node and register a callback against it
cls.template_class = (nuke.Root().knobs().get(
"__template_class__", nuke.Text_Knob("null", "null")).value())
cls.template_class = None if cls.template_class == "" else cls.template_class
# if we are not continuing a previous bake, then we need to
# gather, sort and validate the nodes.
if not bake_list:
cls.input_nodes = nodes or nuke.allNodes(recurseGroups=True)
gathered_nodes = cls.gather(cls.input_nodes)
bake_list = cls.alpha_numeric_sort(gathered_nodes)
getLog().info("Ada: Nodes to bake: {0}".format(bake_list))
# run validation code / frame work before executing tabs
cls.validate(bake_list)
# queue nodes for baking
queue = cls.queue(bake_list)
getLog().info("template class: {}".format(cls.template_class))
# execute registered global/template callbacks before
cls.execute_callbacks("GLOBAL_BEFORE")
cls.execute_callbacks("TEMPLATE_BEFORE",
template_class=cls.template_class)
# process the nodes which have ada tabs
results = cls.process(queue, bake_list, pause)
# execute registered global/template callbacks after
cls.execute_callbacks("TEMPLATE_AFTER")
cls.execute_callbacks("GLOBAL_AFTER",
template_class=cls.template_class)
return results
def loadProjects(self):
self.projects = self.session.getAllProjects()
nk_script = nuke.Root()['name'].value()
self.projectsC.clear()
for project in self.projects:
item = QListWidgetItem(project['name'])
item.setData(Qt.UserRole, project['id'])
self.projectsC.addItem(item)
if self.auto_detect:
prod_match = re.search("^(.*)(" + project['name'] + ")(.*)$",
nk_script)
if prod_match:
self.projectsC.setCurrentItem(item)
def process(self, context):
assert isinstance(context, pyblish.api.Context)
footages = set()
root = nuke.Root()
for n in nuke.allNodes('Read', nuke.Root()):
if n.hasError():
self.log.warning('读取节点出错: %s', n.name())
continue
filename = nuke.filename(n)
mtime = n.metadata('input/mtime')
if not filename or not mtime:
continue
footage = FootageInfo(filename=filename,
mtime=pendulum.from_format(
mtime,
'%Y-%m-%d %H:%M:%S',
tz='Asia/Shanghai'))
footages.add(footage)
instance = context.create_instance('{}个 素材'.format(len(footages)),
filename=root['name'].value(),
family='素材')
instance.extend(footages)
def __init__(self, dest_root):
""" Initialize packaging worker class.
Args:
dest_root (str): Path of destination root folder.
"""
self.error_nodes = []
self.single_results = []
self.sequence_results = {}
self.copy_files_count = 0
self.dest_root = dest_root
self.original_nk = nuke.Root().name()
self.nodes = filter(self.check_node_error, get_read_nodes())
def createWriteNode():
nodes = nuke.allNodes()
OLMSmootherNode = []
head = ''
for i in range(len(nodes)):
name = nodes[i].name()
node = nuke.toNode(name)
projectPath = nuke.Root().name()
filed = projectPath.split('/')
filed.remove(filed[-1])
for i in range(1,len(filed)):
head = os.path.join(head,filed[i])
if node.Class() == 'OLMSmoother':
OLMSmootherNode.append(node)
if len(OLMSmootherNode):
if len(OLMSmootherNode) == 1:
outfilePathDirs = 'D:' + '\\' + head + '\\chAll'
if not os.path.isdir(outfilePathDirs):
os.makedirs(outfilePathDirs)
outfilePath = (outfilePathDirs +'\\chAll'+ '.%04d.png').replace('\\','/')
inputNodeName = OLMSmootherNode[0].input(0).name()
inputNode = nuke.toNode(inputNodeName)
writeNode = nuke.nodes.Write(inputs=[inputNode],file = outfilePath)
writeNode['channels'].setValue('rgba')
writeNode['file_type'].setValue('png')
#此时开始输出渲染
nuke.exectue(writeNode)
readNode = createReadNode(outfilePathDirs.replace('\\','/'))
OLMSmootherNode[0].setInput(0,readNode)
else:
n = 1
for i in range(len(OLMSmootherNode)):
outfilePathDirs = 'D:' + '\\' + head + '\\chAll' + str(n)
if not os.path.isdir(outfilePathDirs):
os.makedirs(outfilePathDirs)
outfilePath = (outfilePathDirs + '\\chAll' + str(n) + '.%04d.png').replace('\\', '/')
inputNodeName = OLMSmootherNode[i].input(0).name()
inputNode = nuke.toNode(inputNodeName)
writeNode = nuke.nodes.Write(inputs=[inputNode],file = outfilePath)
writeNode['channels'].setValue('rgba')
writeNode['file_type'].setValue('png')
#此时开始渲染输出
nuke.exectue(writeNode)
readNode = createReadNode(outfilePathDirs.replace('\\','/'))
OLMSmootherNode[i].setInput(0,readNode)
n += 1
def _framerange_to_be_published(self, item):
"""
Since users have the option to render only a subset of frames,
adding validation to check if the full frame range is being published.
:param item: Item to process
:return: True if yes false otherwise
"""
lss_path = item.properties['node']['cached_path'].value()
lss_data = frangetools.getSequence(lss_path)
log_method = item.properties.get("log_method", "warning")
# Since lss_data will be a list of dictionaries,
# building a dictionary from key value for the ease of fetching data.
info_by_path = self._build_dict(lss_data, key="path")
missing_frames = info_by_path.get(lss_path)['missing_frames']
root = nuke.Root()
# If there are no missing frames, then checking if the first and last frames match with root first and last
# Checking with root because _sync_frame_range() will ensure root is up to date with shotgun
if log_method == "error":
log = self.logger.error
else:
log = self.logger.warning
if missing_frames:
log("Renders Mismatch! Incomplete renders on disk.")
if log_method == "warning":
nuke.message("WARNING!\n"+item.properties['node'].name() +
"\nRenders Mismatch! Incomplete renders on disk.")
return False if log_method == "error" else True
else:
first_rendered_frame = info_by_path.get(lss_path)['frame_range'][0]
last_rendered_frame = info_by_path.get(lss_path)['frame_range'][1]
if (first_rendered_frame > root.firstFrame()) or (last_rendered_frame < root.lastFrame()):
log("Renders Mismatch! Incomplete renders on disk.")
if log_method == "warning":
nuke.message("WARNING!\n"+item.properties['node'].name() +
"\nRenders Mismatch! Incomplete renders on disk.")
return False if log_method == "error" else True
elif (first_rendered_frame < root.firstFrame()) or (last_rendered_frame > root.lastFrame()):
log("Renders Mismatch! Extra renders on disk.")
if log_method == "warning":
nuke.message("WARNING!\n"+item.properties['node'].name() +
"\nRenders Mismatch! Extra renders on disk.")
return False if log_method == "error" else True
return True
def read_from_write():
"""
Create Read node from selected Write node.
:return: None
:rtype: None
"""
selected = nuke.selectedNode()
if selected.Class() == "Write":
if selected["use_limit"].value() is True:
first_frame = selected["first"].value()
last_frame = selected["last"].value()
else:
first_frame = nuke.Root()["first_frame"].value()
last_frame = nuke.Root()["last_frame"].value()
write = nuke.nodes.Read(file=selected["file"].value(),
first=first_frame,
last=last_frame,
origfirst=nuke.Root()["first_frame"].value(),
origlast=nuke.Root()["last_frame"].value())
write.setXpos(selected.xpos() + 100)
write.setYpos(selected.ypos())
else:
nuke.message("Please select a Write node.")
def buildKnob(name, abr):
try:
root = nuke.Root()
if "Deadline" not in root.knobs():
tabKnob = nuke.Tab_Knob("Deadline")
root.addKnob(tabKnob)
if name in root.knobs():
return root.knob(name)
else:
tKnob = nuke.String_Knob(name, abr)
root.addKnob(tKnob)
return tKnob
except:
print("Error in knob creation. " + name + " " + abr)
def __init__(self, *_infos):
nuke.Root().begin()
if _infos:
self.infos = _infos[0]
else:
self.infos = [['CHM201_029_010', 'Q:/Charmed_S2/CHM201/'],
['CHM201_031_100', 'Q:/Charmed_S2/CHM201/'],
['CHM201_031_110', 'Q:/Charmed_S2/CHM201/'],
['CHM201_029_010', 'Q:/Charmed_S2/CHM201/'],
['CHM201_031_100', 'Q:/Charmed_S2/CHM201/'],
['CHM201_031_110', 'Q:/Charmed_S2/CHM201/']]
self.base_path = ''
self.shot_code = ''
def _get_mtime_info():
ret = {}
for n in nuke.allNodes('Read', nuke.Root()):
try:
mtime = time.mktime(
time.strptime(n.metadata('input/mtime'),
'%Y-%m-%d %H:%M:%S'))
except TypeError:
continue
if mtime > since:
ret[nuke.filename(n)] = mtime
ftime = time.strftime('%m-%d %H:%M:%S', time.localtime(mtime))
throtted_warning('{}: [new footage]{}'.format(
u(n.name()), ftime))
return ret
def in_nuke():
shot_name = os.getenv('SHOT')
check = False
cache_dir = os.getenv('CYC_HYDRA_CACHE')
with open(os.path.join(cache_dir, 'shots.json')) as j:
shots = json.load(j)
for shot in shots:
if shot_name == shot:
check = True
if check:
first = shots.get(shot_name).get('first')
last = shots.get(shot_name).get('last')
root = nuke.Root()
root['first_frame'].setValue(first)
root['last_frame'].setValue(last)
def save_ftrack_ui():
ui_dict = {}
knobs = ftrack_default_knobs()
r = nuke.Root()
for knob in knobs:
try:
ui_dict[knob] = r[knob].value()
except NameError:
pass
return ui_dict
def _sync_frame_range(self, item):
"""
Checks whether frame range is in sync with shotgun.
:param item: Item to process
:return: True if yes false otherwise
"""
context = item.context
entity = context.entity
log_method = item.properties.get("log_method", "warning")
if log_method == "error":
log = self.logger.error
else:
log = self.logger.warning
# checking entity validity since it can be invalid/empty in case of Project Level item
if entity:
frame_range_app = self.parent.engine.apps.get("tk-multi-setframerange")
if not frame_range_app:
# return valid for asset/sequence entities
self.logger.warning("Unable to find tk-multi-setframerange app. "
"Not validating frame range.")
return True
sg_entity_type = entity["type"]
sg_filters = [["id", "is", entity["id"]]]
in_field = frame_range_app.get_setting("sg_in_frame_field")
out_field = frame_range_app.get_setting("sg_out_frame_field")
fields = [in_field, out_field]
# get the field information from shotgun based on Shot
# sg_cut_in and sg_cut_out info will be on Shot entity, so skip in case this info is not present
data = self.sgtk.shotgun.find_one(sg_entity_type, filters=sg_filters, fields=fields)
if in_field not in data or out_field not in data:
return True
elif data[in_field] is None or data[out_field] is None:
return True
# compare if the frame range set at root level is same as the shotgun cut_in, cut_out
root = nuke.Root()
if root.firstFrame() != data[in_field] or root.lastFrame() != data[out_field]:
log("Frame range not synced with Shotgun.")
if log_method == "warning":
nuke.message("WARNING! Frame range not synced with Shotgun.")
return False if log_method == "error" else True
return True
def show_dialog(app):
"""
Show the main dialog ui
:param app: The parent App
"""
# defer imports so that the app works gracefully in batch modes
from .dialog import AppDialog
display_name = sgtk.platform.current_bundle().get_setting("display_name")
#print "logger item: "
#print sgtk.custom_debug_handler
#store publish logs alongside other phosphene logs, enable bug submit
logger = sgtk.platform.get_logger(__name__)
#try:
# #from .Debug import DebugHandler
# #phospheneDebugHandler=DebugHandler()
# phospheneDebugHandler=sgtk.custom_debug_handler
# print "hooking phosphene logs into "+str(logger)
# logger.addHandler(phospheneDebugHandler)
#except:
# print format_exc()
#start a progress bar if we're in nuke
if app.engine.instance_name == 'tk-nuke':
import nuke
progressBar = nuke.ProgressTask('Publishing ' +
basename(nuke.Root().name()))
sleep(.25)
logger.info('Phosphene publish loaded')
if app.pre_publish_hook.validate():
# start ui
if app.modal:
app.engine.show_modal(display_name, app, AppDialog)
else:
app.engine.show_dialog(display_name, app, AppDialog)
else:
app.logger.debug("%s validate returned False -- abort publish." %
app.pre_publish_hook.__class__.__name__)
if app.engine.instance_name == 'tk-nuke':
try:
del (progressBar)
except:
pass
def is_locked():
if _ignore_lock["_"]:
return False
def is_publish_source(filename):
return os.path.dirname(filename).endswith("_published")
def is_published_script(filename):
return "/publish/" in filename
root = nuke.Root()
filename = root.name()
if os.path.isfile(filename):
if is_publish_source(filename) or is_published_script(filename):
return True
return False
def _RV_write_Frame_Info(INF, _NK_BASENAME):
info = {}
framerange = {}
i = 0
print "\nSEARCHING WRITE....................."
writeNodes = RecursiveFindNodes("Write", nuke.Root())
# deepWriteNodes = RecursiveFindNodes( "DeepWrite", nuke.Root() )
# writeGeoNodes = RecursiveFindNodes( "WriteGeo", nuke.Root() )
#
# writeNodes.extend(deepWriteNodes)
# writeNodes.extend(writeGeoNodes)
for node in writeNodes:
filename = nuke.filename(node)
filename = filename.replace('\\', '/')
Mnode = node.fullName()
print " RENDERING NODE : %s" % node.fullName()
framerange['firstframe'] = node.firstFrame()
framerange['lastframe'] = node.lastFrame()
framerange['byframe'] = 1
info[Mnode] = framerange
print '" RENDERING NODE : %s---%s-%s"' % (
node.fullName(), node.firstFrame(), node.lastFrame())
print "\nSEARCHING RENDER WRITES......."
if info is not None:
# Mjsonfile = RVLIB.store(INF,info)
#
# data = RVLIB.load(INF)
# print data
print "before write to txt \n%s" % (info)
with open(INF, 'w') as analysefile:
analysefile.write(str(info))
with open(INF, 'r') as rfile:
lines = rfile.readlines()
for line in lines:
print line
print "write success!_____________________________________________"
else:
print("Warning: there is not any write in this file!..............")
def process(self, context):
import nuke
root = nuke.Root()
first_frame = root.firstFrame()
last_frame = root.lastFrame()
fps = root.fps()
context.data["startFrame"] = first_frame
context.data["endFrame"] = last_frame
context.data["fps"] = fps
context.data["label"] += " [%d-%d]" % (first_frame, last_frame)
context.data["label"] += " %d FPS" % fps
self.log.info("Global range: %d-%d" % (first_frame, last_frame))
self.log.info("Global FPS: %d" % fps)
def NameScanLineWindows():
import nuke, os, sys, pyperclip
plat = sys.platform
nkFullPath = nuke.Root().knob('name').getValue()
nkPath, nkName = os.path.split(nkFullPath)
nkPath += "/"
Name = nkName.rpartition(".")[0]
print Name
m = nuke.menu('Nuke')
m.addMenu(Name).addCommand(
'Copy Shot',
'copy2clip(nuke.Root().name().rpartition("/")[2].rpartition("_")[0])',
icon="my.png")
m.addMenu(Name).addCommand('Slapcomps',
'ReadnamesSlapcomp.ReadnamesSlapcomp()',
icon="my.png")
def make_relative():
PD = nuke.Root().knob("project_directory").value()
def relative():
This = nuke.thisNode()
sourceFile = This['file'].getValue()
tempPath = sourceFile.split(PD)
readname = tempPath[-1]
fn = readname.split('./')
print fn
This['file'].setValue('./' + fn[-1])
if not PD:
nuke.message('Empty Project Directory in Project Settings')
else:
relative()
print PD
def BGRender():
write = nuke.selectedNode()
Name = write['name'].value()
first = nuke.toNode("root")['first_frame'].value()
first = int(first)
first = str(first)
last = nuke.toNode("root")['last_frame'].value()
last = int(last)
last = str(last)
G = path = nuke.env['ExecutablePath'] # nuke location
Y = nuke.Root().knob('name').getValue() # project name
panel = nuke.Panel("BG Render")
panel.addSingleLineInput("Run Me:",u"\u0022" + G + u"\u0022" + " -X "+ " " + Name+" " + Y + " " + first + ","+ last )
panel.setWidth(700)
panel.show()
nuke.scriptSave()
nukescripts.start("C:\WINDOWS\system32\cmd.exe")
def output(self, filename):
"""Save .nk file and render .jpg file."""
LOGGER.info('{:-^30s}'.format('开始 输出'))
_path = filename.replace('\\', '/')
_dir = os.path.dirname(_path)
if not os.path.exists(_dir):
os.makedirs(_dir)
# Save nk
LOGGER.info('保存为:\t%s', _path)
nuke.Root()['name'].setValue(_path)
nuke.scriptSave(_path)
# Render png
if CONFIG.get('RENDER_JPG'):
for n in nuke.allNodes('Read'):
name = n.name()
if name in ('MP', 'Read_Write_JPG'):
continue
for frame in (n.firstFrame(), n.lastFrame(),
int(nuke.numvalue('_Write.knob.frame'))):
try:
render_png(n, frame)
break
except RuntimeError:
continue
# Render Single Frame
n = nuke.toNode('_Write')
if n:
n = n.node('Write_JPG_1')
n['disable'].setValue(False)
for frame in (int(nuke.numvalue('_Write.knob.frame')),
n.firstFrame(), n.lastFrame()):
try:
nuke.execute(n, frame, frame)
break
except RuntimeError:
continue
else:
self._errors.append('{}:\t渲染出错'.format(
os.path.basename(_path)))
raise RenderError('Write_JPG_1')
LOGGER.info('{:-^30s}'.format('结束 输出'))
def make_relative_Toolbar():
PD = nuke.Root().knob("project_directory").value()
This = nuke.selectedNodes()
if not PD:
nuke.message('Empty Project Directory in Project Settings')
else:
for each in This:
if each.Class() in ('Read', 'ReadGeo2'):
def relative():
sourceFile = each['file'].getValue()
tempPath = sourceFile.split(PD)
readname = tempPath[-1]
fn = readname.split('./')
print fn
each['file'].setValue('./' + fn[-1])
relative()
else:
pass
def makeThumbnail():
frameFirst = str('%0*d' % (4, int(nuke.Root()['first_frame'].value())))
for node in nuke.selectedNodes('Write'):
fileName = node['file'].value()
FirstFramefileName = fileName.replace("%04d", frameFirst)
NewFileName = fileName.rsplit(
'/', 1)[0] + '/.' + node['file'].value().split('/')[-1]
FirstFrameNewFileName = NewFileName.replace("%04d", "thumbnail")
ext = FirstFrameNewFileName.split('.')[-1]
FirstFrameNewFileName = FirstFrameNewFileName.replace(ext, "jpg")
ThePath = os.getenv("CYC_ENGINE_NUKE") + '/NukeTools_1.01'
TheNukeVersion = os.getenv('NUKEVERSION')
IMCmd = (('nuke%s -t %s/Python/convert.py %s %s') %
(TheNukeVersion, ThePath, FirstFramefileName,
FirstFrameNewFileName))
os.system(IMCmd)
print "the file: ", FirstFrameNewFileName, "has been created!"
def SmartOffset():
r = nuke.Root().knob('first_frame').getValue()
n = nuke.selectedNode()
o = n.Class()
if o == "Read":
t = n['first'].getValue()
u = n['last'].getValue()
b = u - t
b = int(b)
shot = str(b)
y = nuke.createNode("TimeOffset")
y['time_offset'].setValue(-t + r)
n['postage_stamp'].setValue(0)
y['postage_stamp'].setValue(0)
n['label'].setValue(shot + " frames")
y['label'].setValue(shot + " frames")
else:
nuke.createNode("TimeOffset")
def setupFromMasterScirpt(keyPrjData, extraJobData, nkFile, masterScriptPath):
nuke.scriptOpen(masterScriptPath)
root = nuke.Root()
metaNode = setupMetadataNode(keyPrjData)
srcReadNode = setupSrcReadNode(keyPrjData)
dnsWriteNode = setupDnsWriteNode(keyPrjData)
setupDnsReadNode(dnsWriteNode)
setupHresWriteNode(keyPrjData, srcReadNode)
setupHresReadNode(srcReadNode)
dliesWriteNode = setupDliesWriteNode(keyPrjData)
prmReadNode = setupPrmReadNode(keyPrjData)
setupDliesReadNode(dliesWriteNode, prmReadNode)
setFrameRange(extraJobData.get('frames'), root,
prmReadNode['file'].value(), metaNode)
saveInitNkScript(nkFile)
def __init__(self, target_dir, Progress_Main=None, show_Progress=None):
self._read_list = ['Read', 'ReadGeo2', 'Camera2', 'SmartVector', 'DeepRead']
self.target_dir = target_dir
self.Progress_Main = Progress_Main
self.show_Progress = show_Progress
self.config = config.config
self.m_dir = self.config["m_dir"]
self.p_dir = self.config["p_dir"]
self.g_dir = self.config["g_dir"]
self._relative_path = '[python {nuke.script_directory()}]'
# current project path
current_project = nuke.Root().name()
proj_path = os.path.splitext(current_project)
self._nuke_proj = current_project
self._proj_name = (os.path.split(proj_path[0]))[1]
self._proj_basename = os.path.basename(current_project)
self._proj_path = os.path.dirname(current_project)
def __init__(self):
super(NukeToArchive, self).__init__()
script_dir = os.path.dirname(__file__)
profile = joinpath(script_dir, 'profile.ini')
nuke_file = nuke.Root().name()
if not nuke_file:
nuke.message('Please save your nuke script first.')
self.source_dir = os.path.dirname(nuke_file)
if os.path.exists(profile):
cf = ConfigParser.ConfigParser()
cf.read(profile)
self.source_dir = cf.get("root", "path")
self.task = None
self.base_name = os.path.basename(nuke_file).split('.')[0]
self.pack_dir = joinpath(self.source_dir, self.base_name)
self.nuke_version = nuke.NUKE_VERSION_STRING
if not os.path.exists(self.pack_dir):
os.makedirs(self.pack_dir)
self.pack_ = '[file dirname [value root.name]]/'
def _add_root_info():
"""add info to root. """
artist = nuke.value('preferences.wlf_artist', '')
if not artist:
return
if not nuke.exists('root.wlf'):
n = nuke.Root()
k = nuke.Tab_Knob('wlf', b'吾立方')
k.setFlag(nuke.STARTLINE)
n.addKnob(k)
k = nuke.String_Knob('wlf_artist', b'制作人')
k.setFlag(nuke.STARTLINE)
k.setValue(artist)
n.addKnob(k)
else:
if nuke.exists('root.wlf_artist') and not nuke.value('root.wlf_artist', ''):
nuke.knob('root.wlf_artist', artist)
