workbook.save(outxls)，保存xls，出现上面的错误原因是：outxls不是错误
arcpy.AddMessage("--------"+outxls)
cannot concatenate ‘str‘ and ‘geoprocessing value object‘ objects
原因也是str不是字符串
coercing to Unicode: need string or buffer, geoprocessing value object found
原文：https://www.cnblogs.com/gisoracle/p/11688298.html