Add a topology and its associated layers to a map document with a python script

Question

I would like to add a topology and its associated layers to a map document with a python script (the script does many things and at the end I want it to load the layers to the mxd).  When I try to use

arcpy.MakeFeatureLayer_management (topology_layer,feature_layer)
lyrLayer = arcpy.mapping.Layer(feat_layer)
arcpy.mapping.AddLayer(df,lyrLayer, "TOP")

it says:
ExecuteError: Failed to execute. Parameters are not valid.
ERROR 000732: Input Features: Dataset \dbs\DBS_ntdisk	iger10\gdb\geo065.gdb\Tiger10\ed15_topology does not exist or is not supported

What type of layer is the topology? how can I add it to the current mxd?
Thanks!

Geography · Answer

It appears that I ran into the same question. Did you figure out how to do it using arcpy?

MathewCoyle · Answer

You have to save it as a layer file, create a layer object from the file, then add it.

Exampleimport arcpy

topology_path = 'path1'
layerfile_path = 'path2'

mxd = arcpy.mapping.MapDocument('current')
df = arcpy.mapping.ListDataFrames(mxd)[0]
layer = arcpy.mapping.Layer(layerfile_path)
arcpy.mapping.AddLayer(df, layer)

Edit: disregard, this method does not work natively. It only works if you have already saved the topology as a layer file.

marisavallve · Answer

Thank you for your answer.

Well no ... feat_class and feat_layer are two different things:

feat_class ="\\dbs\DBS_ntdisk\tiger10\gdb\geo065.gdb\Tiger10\ed15_topology"
feat_layer = "ed_topology"
symbologyLayer ="\\dbs\DBS_ntdisk\tiger10\Symbology_LayerFiles\ed_topology.lyr"

arcpy.MakeFeatureLayer_management(feat_class,feat_layer)      ####This cannot create a layer from a topology layer..
                                                                                                so nothing works after this ...
arcpy.ApplySymbologyFromLayer_management(feat_layer,symbologyLayer)
lyrLayer = arcpy.mapping.Layer(feat_layer)
arcpy.mapping.AddLayer(df,lyrLayer, "TOP")

**** So this works for any feature class but not for topology. So I don't know how to add topology to my mxd with python... yet ...