ArcGIS 10 arcpy to add a WMS Service to MXD

I want to batch insert WMS layer to my arcmap MXD project with python/arcpy script.

Some issues has been unanserwed, here my “state of art”:

• ESRI IDEAS
• ESRI GeoNet community #1
• ESRI GeoNet community #2

All of these solution propose to use

1. ArcMap to Add WMS layer manually
2. do “Save as Layer File”

3. reuse the .lyr to add to a new TOC by arcpy with this code

   mxd = arcpy.mapping.MapDocument("CURRENT")  
   df = arcpy.mapping.ListDataFrames(mxd)[0]   
   imagery_lyr = arcpy.mapping.Layer(r"pathto.lyr")  
   arcpy.mapping.AddLayer(df, imagery_lyr)  
   

The lastest idea work properly with “static” WMS services.
When you have a “dynamic” changing WMS services, you need to maintain manually all the pre-generated lyr.

Does somebody know how to load WMS layer into ArcMap MXD with arcpy?

Does somebody know how to create .lyr file from WMS with arcpy?