I am currently trying to add all the feature classes contained within a gdb to a group layer in ArcGIS Pro via a script. I have however not managed to add more than one single feature class at a time.

By looking at the script below, do you have any suggestions about how to solve this?

arcpy.env.workspace = "C:\\TEST_ENV\\AGOL_output\\AGOL.gdb"
datasets = arcpy.ListDatasets(feature_type='feature')
datasets = [''] + datasets if datasets is not None else []
rootPath_aprx = 'C:\\TEST_ENV\\AGOL_output\\'
aprx = arcpy.mp.ArcGISProject(rootPath_aprx + 'WMStest1.aprx')
aprxMap = aprx.listMaps("Map")[0]
targetGroupLayer = aprxMap.listLayers('Group1')[0]
for ds in datasets:
    for fc in arcpy.ListFeatureClasses(feature_dataset=ds):
        path = os.path.join(arcpy.env.workspace, ds, fc)
        for GroupLayer in targetGroupLayer:
            # print(l)
            if str(GroupLayer) == GroupName:
                    aprxMap.addLayerToGroup(aprxMap, targetGroupLayer, path, ['AUTO_ARRANGE'])

The error I am receiving when I run the script is:

for GroupLayer in targetGroupLayer: TypeError: 'Layer' object is not iterable

1 Answer 1


You are setting:

targetGroupLayer = aprxMap.listLayers('Group1')[0]

The index of 0 means that you are setting targetGroupLayer to the first item in the list returned by listLayers i.e. targetGroupLayer is being set to a Layer object.

You then use:

for GroupLayer in targetGroupLayer:

to try and iterate a Layer object which inevitably gives you TypeError: 'Layer' object is not iterable.

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