Maya Python: addAttr
# Adding a new string attribute import maya.cmds as mc; mc.select(cl=1); null= mc.group(em=1); attrName= "testAttr"; attrValue= "This is a test."; mc.addAttr(null,sn=attrName,ln=attrName,dt="string"); mc.setAttr(null+"."+attrName,attrValue,type="string",l=1); mc.select(null);