topic Re: add_layer 'NoneType' object is not iterable in ArcGIS API for Python Questions

add_layer 'NoneType' object is not iterable

glewi3 — Mon, 04 Jan 2021 02:42:28 GMT

im trying to do tutorial at here:

https://developers.arcgis.com/python/sample-notebooks/land-cover-classification-using-unet/

when i get up to this line i get the error

m.add_layer(world_imagery_layer)

TypeError: 'NoneType' object is not iterable

however the other item can be added to my map (m) just fine

m.add_layer(label_layer)

ive tried:

https://community.esri.com/t5/arcgis-api-for-python-questions/nonetype-quot-error-when-adding-layer-to-webmap-using-python-api/m-p/764315

but apparently .Layer() isn't an attribute

AttributeError: 'GIS' object has no attribute 'Layer'

im not sure why one layer can be added but the other can't?

Re: add_layer 'NoneType' object is not iterable

RandyBurton — Mon, 04 Jan 2021 03:09:05 GMT

I assume somewhere in your code you are setting a value for world_imagery_layer. Something like:

world_imagery_item = ent_gis.content.search("title: WorldImagery_AOI_NewYork owner:api_data_owner", "Map Image Layer")[0] world_imagery_layer = world_imagery_item.layers[0] m.add_layer(world_imagery_layer)

The error suggests you might have a typo in the layer's name. The layer would not be found and a None would be returned. If you don't spot the error, you should share the bit of code where the world_imagery_layer is being set.

Re: add_layer 'NoneType' object is not iterable

MehdiPira1 — Mon, 04 Jan 2021 03:23:48 GMT

Hi @glewi3

What version of API are you using?

I'm getting the same error in 1.8.1 however I tested it in 1.8.3 and it's working.

I can recommend to upgrade your ArcGIS API for Python version to 1.8.3 and it should work.

Re: add_layer 'NoneType' object is not iterable

glewi3 — Mon, 04 Jan 2021 04:22:19 GMT

in anaconda navigator it says my arcgis library/package is 1.7.1 is that what u mean?

if i install arcgis 1.8.3 with anaconda then arcpy cant be installed because of conflicts. and i need arcpy in order to get some beginning bit to work. how i did it originally was i installed arcpy then arcgis (default version) came with it.

Re: add_layer 'NoneType' object is not iterable

glewi3 — Mon, 04 Jan 2021 03:58:12 GMT

world_imagery_item = gis.content.search("title: WorldImagery_AOI_NewYork",
"Map Image Layer")[0] # the index might change
world_imagery_item

world_imagery_layer = world_imagery_item.layers[0]

m = gis.map("Kent county, Delaware")
m

m.add_layer(world_imagery_layer)

Re: add_layer 'NoneType' object is not iterable

glewi3 — Mon, 04 Jan 2021 04:32:32 GMT

thx

i created a whole new py36 environment in anaconda navigator and added Arcgis 1.8.3 to it then added it as a new kernal to jupyter and recopied every cell and now it all works. Thanks!

Re: add_layer 'NoneType' object is not iterable

MehdiPira1 — Mon, 04 Jan 2021 05:09:12 GMT

@glewi3

Glad to hear that.

Not a problem.

Re: add_layer 'NoneType' object is not iterable

glewi3 — Mon, 04 Jan 2021 05:15:26 GMT

do u then know how to get an image server set up? i dont know why this isn't shown in the tutorial...

Re: add_layer 'NoneType' object is not iterable

MehdiPira1 — Mon, 04 Jan 2021 05:31:48 GMT

@glewi3

If you have ArcGIS Image Server installed, go to ArcGIS Server Manager > Site > Data Stores > Database

and create / register Raster Store. The path can be a shared folder.

Re: add_layer 'NoneType' object is not iterable

glewi3 — Mon, 04 Jan 2021 22:45:05 GMT

Hey sorry again

Do you know how to do this same thing with ArcGIS pro?

Re: add_layer 'NoneType' object is not iterable

MehdiPira1 — Tue, 05 Jan 2021 01:27:45 GMT

@glewi3 ,

Unfortunately, you can't create / add data stores for an Image Server with ArcGIS Pro.

You can only edit and manage the registered ones though.