Get the layer ID within a map with Python

[FrancisMoisan1]

Hi!, I need to get the layer id within a map in ArcGIS Pro.  It need to be done with Python, but can't find the way to do it.  Any idea ? Impossible ? 

[HannesZiegler]

Take a look at arcpy.mp, I think this gets you what you want:

aprx = arcpy.mp.ArcGISProject("CURRENT")
m = aprx.listMaps()[0]
lyrs = m.listLayers()
[(i, lyr.name) for i, lyr in enumerate(lyrs)]

returns

[(0, 'TestLine'), (1, 'TestPoint'), (2, 'TestPoint_Raster'), (3, 'TestPoly'), (4, 'TestPoint'), (5, 'World Topographic Map'), (6, 'World Hillshade')]

[FrancisMoisan1]

Thanks for the info, but that "id" is just the order within the project.  I look to get the ID that is attached to the layer within the properties.

[HannesZiegler · Accepted solution]

Ah I see, yes you can get that:

aprx = arcpy.mp.ArcGISProject("CURRENT")
m = aprx.listMaps()[0]
lyrs = m.listLayers()
for lyr in lyrs:
    print(lyr.getDefinition("V3").serviceLayerID)

Have a look at CIM access, it's quite useful, there is much more you can do with it besides this

[FrancisMoisan1]

That was it!  thanks!