Question：
whether I can use a script to convert a skeleton of a ZSphere to a curve？
Thank you very much！
In theory, yes, though in practice I don’t know what issues there might be as I’ve not tried it. But you could get each ZSphere position and then use that to create a point ona Curve:
http://docs.pixologic.com/user-guide/customizing-zbrush/zscripting/command-reference/#Curves