def __init__(self, template_path):

self.template = template_path

nuke.scriptReadFile(self.template)

def __set_item_value(self, node, node_data):

for item, value in node_data.items():

node_type = node.Class()

if node_type == "Read":

self.readnode.append(node)

if item == "file":

node[item].fromUserText(value)

elif node_type == "Write":

self.wirtenode.append(node)

else:

node[item].setValue(value)

def __set_node_data(self, nodes_data):

for node_name, node_data in nodes_data.items():

node = nuke.toNode(node_name)

if not node:

raise Exception("Can not find Node name %s"%node)

self.__set_item_value(node, node_data)

def __find_nodes(self, type):

nodes = []

for node in nuke.allNodes():

if node.Class() == type:

nodes.append(node)

return nodes

def render(self, input_path, export_path, frame_range, nodes_data=None):

if nodes_data:

self.__set_node_data(nodes_data)

frame_range_pattern = re.match("^(?P<first_frame>\d+)[\s,;_\-](?P<last_frame>\d+)$", frame_range)

if not frame_range_pattern:

raise ValueError("%s 参数错误"%frame_range)

first_frame = int(frame_range_pattern.group("first_frame"))

last_frame = int(frame_range_pattern.group("last_frame"))

for readnode in self.__find_nodes("Read"):

readnode["file"].fromUserText(input_path)

for wirtenode in self.__find_nodes("Write"):

if os.path.isdir(export_path):

export_basename = os.path.basename(wirtenode["file"].value())

export_path = os.path.join(export_path, export_basename)

wirtenode["file"].fromUserText(export_path)