can only concatenate list (not "str") to list -- PROBLEM

[danielblaze]

Hi, i'm trying to mirror the channel box attributes of my left joint chain from left to right.

However i'm getting an error with list concatenation!!

Image and code attached below

Can someone help me please?

Thanks

Daniel

______________________________

import maya.cmds as cmds

sel = cmd.ls(sl=True, dag=True)

leftSel = sel[:len(sel)/2]
rightSel = sel[len(sel)/2:]

cbAttr = cmd.listAttr(leftSel, k=1)

for i in cbAttr:

L_objVal = cmds.getAttr(leftSel + '.' + i)

if i == 'translateX':
cmds.setAttr(rightSel + '.' + i, L_objVal*-1)

if i == 'translateY':
cmds.setAttr(rightSel + '.' + i, L_objVal)

if i == 'translateZ':
cmds.setAttr(rightSel + '.' + i, L_objVal)

if i == 'rotateX':
cmds.setAttr(rightSel + '.' + i, L_objVal)

if i == 'rotateY':
cmds.setAttr(rightSel + '.' + i, L_objVal)

if i == 'rotateZ':
cmds.setAttr(rightSel + '.' + i, L_objVal)

if i == 'scaleX':
cmds.setAttr(rightSel + '.' + i, L_objVal)

if i == 'scaleY':
cmds.setAttr(rightSel + '.' + i, L_objVal)

if i == 'scaleZ':
cmds.setAttr(rightSel + '.' + i, L_objVal)

[lanh.hong · Accepted solution]

Hi danielblaze,

The reason you're getting that error is because leftSel and rightSel are lists while '.' and i  are strings. So concatenating a list with strings does not work in Python. You'd have to loop through the elements in leftSel/rightSel lists if you want to concat with the strings. 

Regards,

Lanh