Count cars script not working, KeyError: 'layers'

[DavideBoazzi]

I'm running this count cars in aerial imagery script  and everything seems to be working until I run the detection block. It says KeyError: 'layers'. How to fix this?

[Clubdebambos]

Hi @DavideBoazzi 

We are missing important steps in your script, can you post the entire code before you get the error?

In the example you are following, the imagery variable is a list containing four Image Layer item objects. Your script is assuming that imagery[i] (one of these Image Layer objects) has a property called layers. Make sure your imagery list is indeed a list of Imagery Layers. 

If you print(imagery), is a list of Imagery Layer Item objects returned?

[DavideBoazzi]

Hi @Clubdebambos I'm running exactly the same code that is provided in the link, with no changes. I also published my layers as imagery layers.

Here's what

imagery = gis.content.search("aerial*") 

print(imagery)

returns (I loaded 4 layers and 4 these layers are displayed):

[<Item title:"aerial3" type:Image owner:MICGis>, <Item title:"aerial1" type:Image owner:MICGis>, <Item title:"aerial4" type:Image owner:MICGis>, <Item title:"aerial2" type:Image owner:MICGis>]

[Clubdebambos]

Hi @DavideBoazzi ,

Your Item type says Image, not Imagery Layer like in the example.

Do your items in ArcGIS Online say Imagery Layer like below?

This type of Image content item will not work.

There is a difference between an Image

and an Imagery Layer which is an Image Service 

Source: https://developers.arcgis.com/rest/users-groups-and-items/items-and-item-types.htm