python help,please?

i am getting this error (don’t know Python, please help)

( [I](line 59):

sknames = [sk.name for sk in target.data.shape_keys]
TypeError: ‘NoneType’ object is not iterable

on this script ([AddOn] Import OBJ Sequence As Shape Keys(on one object))
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##### BEGIN GPL LICENSE BLOCK

This program is free software; you can redistribute it and/or

modify it under the terms of the GNU General Public License

as published by the Free Software Foundation; either version 2

of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,

but WITHOUT ANY WARRANTY; without even the implied warranty of

MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

GNU General Public License for more details.

You should have received a copy of the GNU General Public License

along with this program; if not, write to the Free Software Foundation,

Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

##### END GPL LICENSE BLOCK

bl_info = {
‘name’: ‘Load Obj Sequence as Shape Keys’,
‘author’: ‘cmomoney’,
‘version’: (0, 2),
‘blender’: (2, 6, 7),
‘category’: ‘Import-Export’,
‘location’: ‘File > Import/Export’,
‘wiki_url’: ‘’}

import bpy
import os
from bpy.props import *

class LoadObjAsShapekey(bpy.types.Operator):
bl_idname = ‘load.obj_as_shapekey’
bl_label = ‘Import OBJ as Shape Keys’
bl_options = {‘REGISTER’, ‘UNDO’}
bl_description = “Import Obj sequence as shape key(s)”

filepath = StringProperty(name=“File path”, description=“File filepath of Obj”, maxlen=4096, default="")
filter_folder = BoolProperty(name=“Filter folders”, description="", default=True, options={‘HIDDEN’})
filter_glob = StringProperty(default="*.obj", options={‘HIDDEN’})
files = CollectionProperty(name=‘File path’, type=bpy.types.OperatorFileListElement)
filename_ext = ‘.obj’

@classmethod
def poll(cls, context):
return context.active_object is not None and context.active_object.type == ‘MESH’

def execute(self, context):

get file names, sort, and set target mesh

spath = os.path.split(self.filepath)
files = sorted([file.name for file in self.files])
target = bpy.context.scene.objects.active

add all ojs in sequence as shape keys

for f in files:
fp = spath[0] + “” + f
self.load_obj(fp)

now delete objs

sknames = [sk.name for sk in target.data.shape_keys.key_blocks]
bpy.ops.object.select_all(action=‘DESELECT’)
for obj in sknames:
if obj != ‘Basis’:
target.data.shape_keys.key_blocks[obj].interpolation = ‘KEY_LINEAR’
bpy.context.scene.objects.active = bpy.data.objects[obj]
bpy.data.objects[obj].select = True
bpy.ops.object.delete()
bpy.ops.object.select_all(action=‘DESELECT’)

reselect target mesh and make active

bpy.context.scene.objects.active = target
target.select = True
return{‘FINISHED’}

def invoke(self, context, event):
wm = context.window_manager.fileselect_add(self)
return {‘RUNNING_MODAL’}

def load_obj(self, fp):
bpy.ops.import_scene.obj(filepath=fp)
bpy.ops.object.join_shapes()
return

def menu_func_import(self, context):
self.layout.operator(LoadObjAsShapekey.bl_idname, text=“Obj As Shapekey(.obj)”)

def register():
bpy.utils.register_class(LoadObjAsShapekey)
bpy.types.INFO_MT_file_import.append(menu_func_imp ort)

def unregister():
bpy.utils.unregister_class(LoadObjAsShapekey)
bpy.types.INFO_MT_file_import.remove(menu_func_imp ort)

if name == “main”:
register()