I'm a Prolific Blogger in the Japanese community!
My top post is "How to store Excel data in IRIS globals in Embedded Python",  but I recommend the second-place post below(sorry, Japanese only).
IRISで使用できるユーティリティ一覧 (IRIS utility list)

@Mihoko Iijima 
Thank you Mihoko-san!
I'll try it!

I could get it like as follows. 
Thank you very much.

 newex = iris.cls('%Exception.PythonException')._New()
 newex.Code=str(ex.args)
 newex = iris.cls('%Exception.PythonException')._New(repr(ex),'','',str(ex.args)) 
 return newex 

===
+----------------- attribute values ------------------
| Code = "" <Set>
| Data = "('division by zero',)" <Set>
| ExceptionObject = ""
| InnerException = "" <Set>
| Location = "" <Set>
| Name = "ZeroDivisionError('division by zero')" <Set>
: