You could do a workaround by setting the selection symbol, saving to a .lyr file, and loading the layer and setting the source using arcpy.mapping. This is really the only way to mess with things not exposed as arcpy.mapping object methods.
You could do a workaround by setting the selection symbol, saving to a .lyr file, and loading the layer and setting the source using arcpy.mapping. This is really the only way to mess with things not exposed as arcpy.mapping object methods.