RasterManager.add() fails to add image services.

Solution de contournement

It is possible to resolve this issue by manually changing the source code, however only follow this instruction if it's required.

1. Make a backup of the _layer.py file referenced in the runtime error (e.g. /opt/anaconda3/envs/gdal/lib/python3.6/site-packages/arcgis/raster/_layer.py).
2. Open the original _layer.py file to perform edits.
3. Locate the _add_rasters function.
4. Modify the line that reads "service_url = [service_url]" to "service_url = service_url"
5. Save changes (if using a Jupyter Notebook also restart the kernel).

After making the above changes the function works as expected with a service URL.

Étapes pour reproduire