nav[aria-label="Primary Navigation"] { padding: 0; & ul { list-style: none; width: 100%; display: flex; flex-direction: row; justify-content: start; align-items: start; gap: 30px; padding: 0; & li { margin: 0; } & ul li { list-style: none; } } }

KeyError in Creating Web Map Inventory

chintakandel

I am trying to create a web map inventory and encountered a KeyError.

gis = GIS("Portal url", "username", "password")
search_results = gis.content.search(query="tags:streamflow", item_type="Web Map")

l = []
for s in search_results:
   wmo = arcgis.mapping.WebMap(s)
   ops_layers = wmo['operationalLayers']
   basemap_layers = wmo['baseMap']['baseMapLayers']

KeyError: 'operationalLayers'

Any suggestions on how to handle KeyError?

Finde mehr Beiträge mit dem Tag

Accepted answers

JeffBigos

Hi Chintamani,

In your code above, I see 2 spots where you are using the layer type key:

1. d["Layer Type"] = "Operational Layer{}".format(op_layer["layerType"])

2.j["LayerType"] = "BasemapLayer{}".format(base_layer["layerType"])

when you see the error which of those lines is the error occurring with?

Thanks,

Jeff

All comments

bixb0012

Even using 1.4.x, I never got the approach of web_map_obj['opertionalLayers'] to work, which is why I posted two alternative methods to access the operational layers. The current arcgis.mapping module — arcgis 1.5.0 documentation for WebMap states operational layers should be accessed via the layers property (option #1 that I posted):

layers
Operational layers in the web map :return: List of Layers as dictionaries

AlistairFox2

why does under 1.5 i now get this keyerror for opedrational layers. I'm using the same code and loading in the same webmap json from file. But the dictionary does not contain any operationallayer keys after the json file has been loaded in. what changed at 1.5?

for subdir, dirs, files in os.walk(rootdir3):
for file in files:
#print (os.path.join(subdir, file))
print("processing: " + file)

#modify existing web map
web_map_json = str()

# read a previously downloaded and saved web map json from text file
# store each template json file in a seperate folder from the gdb files. Loop through all the templates in each country
with open(os.path.join(subdir, file),"r") as file_handle:
web_map_json = json.load(file_handle)

# publish a new web map setting some attributes and using the json as input
# will need a title and snippet for each country to be somewhere in a list
web_map_item_properties = {'title':file[:-5],
      'type':'Web Map',
      'snippet':'This map shows a Template Map',
      'tags':'ArcGIS Python API',
      'text':json.dumps(web_map_json)}

# add to the portal
web_map_item = gis.content.add(web_map_item_properties)

# create a web map object out of the item
web_map_obj = arcgis.mapping.WebMap(web_map_item)

layer_list = web_map_obj['operationalLayers']

***get KeyError for above line

chintakandel

Hi Jeff,

Thank you for your suggestions. I have changed my format function but still

encounter a layerType keyError.

Best regards,

Chintamani

image.png

JeffBigos

Chintamani,

Looking through the code you have provided I see something that could be causing empty operational layers in the resulting dictionary:

in your format function change the () to { } as you see below

d["Layer Type"] = "Operational Layer{}".format(op_layer["layerType"])

Another spot I see that is on the following line:
j["LayerType"] = "BasemapLayer{}".format(base_layer["layerType"])

Try out that change and let me know how it goes.

Thanks,

Jeff

chintakandel

Hi Jeff,

Thank you for your suggestions to get the operational layers as a key from

a dictionary.

I am using 1.4.2 version.

I have tried to get the operational layers as a key from a dictionary,

still have KeyError:'layerType'.

for s in search_results:

wmo = arcgis.mapping.WebMap(s)

ops_layers = wmo.layers

basemap_layers = wmo.basemap['baseMapLayers']

for op_layer in ops_layers:

d = collections.OrderedDict()

d["Web Map Name"] = s.title

d["Web Map Item ID"] = s.itemid

d["Layer Type"] = "Operational Layer

()".format(op_layer["layerType"]) d["Layer URL"] = op_layer["url"] l.append(d) for base_layer in basemap_layers: j = collections.OrderedDict() j["Web Map Name"] = s.title j["Web Map Item ID"] = s.itemid j["Layer Type"] = "Basemap Layer ()".format(base_layer["layerType"])

j["Layer URL"] = base_layer["url"]

l.append(j)

Thanks again,

Chintamani

bixb0012

A couple of different ways to alter your code to make it work. Option #1:

gis <SPAN class="operator token">=</SPAN> GIS<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"Portal url"</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"username"</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"password"</SPAN><SPAN class="punctuation token">)</SPAN>
search_results <SPAN class="operator token">=</SPAN> gis<SPAN class="punctuation token">.</SPAN>content<SPAN class="punctuation token">.</SPAN>search<SPAN class="punctuation token">(</SPAN>query<SPAN class="operator token">=</SPAN><SPAN class="string token">"tags:streamflow"</SPAN><SPAN class="punctuation token">,</SPAN> item_type<SPAN class="operator token">=</SPAN><SPAN class="string token">"Web Map"</SPAN><SPAN class="punctuation token">)</SPAN>

l <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">]</SPAN>
<SPAN class="keyword token">for</SPAN> s <SPAN class="keyword token">in</SPAN> search_results<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp; wmo <SPAN class="operator token">=</SPAN> arcgis<SPAN class="punctuation token">.</SPAN>mapping<SPAN class="punctuation token">.</SPAN>WebMap<SPAN class="punctuation token">(</SPAN>s<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp; ops_layers <SPAN class="operator token">=</SPAN> wmo<SPAN class="punctuation token">.</SPAN>layers
&nbsp;&nbsp; basemap_layers <SPAN class="operator token">=</SPAN> wmo<SPAN class="punctuation token">.</SPAN>basemap<SPAN class="punctuation token">[</SPAN><SPAN class="string token">'baseMapLayers'</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

Option #2

gis <SPAN class="operator token">=</SPAN> GIS<SPAN class="punctuation token">(</SPAN><SPAN class="string token">"Portal url"</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"username"</SPAN><SPAN class="punctuation token">,</SPAN> <SPAN class="string token">"password"</SPAN><SPAN class="punctuation token">)</SPAN>
search_results <SPAN class="operator token">=</SPAN> gis<SPAN class="punctuation token">.</SPAN>content<SPAN class="punctuation token">.</SPAN>search<SPAN class="punctuation token">(</SPAN>query<SPAN class="operator token">=</SPAN><SPAN class="string token">"tags:streamflow"</SPAN><SPAN class="punctuation token">,</SPAN> item_type<SPAN class="operator token">=</SPAN><SPAN class="string token">"Web Map"</SPAN><SPAN class="punctuation token">)</SPAN>

l <SPAN class="operator token">=</SPAN> <SPAN class="punctuation token">[</SPAN><SPAN class="punctuation token">]</SPAN>
<SPAN class="keyword token">for</SPAN> s <SPAN class="keyword token">in</SPAN> search_results<SPAN class="punctuation token">:</SPAN>
&nbsp;&nbsp; wmo <SPAN class="operator token">=</SPAN> arcgis<SPAN class="punctuation token">.</SPAN>mapping<SPAN class="punctuation token">.</SPAN>WebMap<SPAN class="punctuation token">(</SPAN>s<SPAN class="punctuation token">)</SPAN>
&nbsp;&nbsp; ops_layers <SPAN class="operator token">=</SPAN> wmo<SPAN class="punctuation token">.</SPAN>definition<SPAN class="punctuation token">[</SPAN><SPAN class="string token">'operationalLayers'</SPAN><SPAN class="punctuation token">]</SPAN>
&nbsp;&nbsp; basemap_layers <SPAN class="operator token">=</SPAN> wmo<SPAN class="punctuation token">.</SPAN>definition<SPAN class="punctuation token">[</SPAN><SPAN class="string token">'baseMap'</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="punctuation token">[</SPAN><SPAN class="string token">'baseMapLayers'</SPAN><SPAN class="punctuation token">]</SPAN><SPAN class="line-numbers-rows"><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN><SPAN>‍</SPAN></SPAN>

JeffBigos

Hi Chintamani,

What version of the api are you using?

you can check by running the following code:

import arcgis

print(arcgis.__version__)

Recently I had something similar and figured things out in the following way:

to get the operational layers as a key from a dictionary I converted the webmap to json as you see below:

wmoJson = wmo.get_data(try_json=True)
wmo['operationalLayers']

Another access point to the operational Layers would be through the layers property
of the webmap class in the api, but access to the property in the webmap class depends on
the version of the api you have:

wmo.layers

arcgis.mapping module — arcgis 1.4.2 documentation 

Let me know if this helps.

Thanks,

Jeff

Nimm an der Unterhaltung teil

Angemeldete Mitglieder können Beiträge verfassen, Updates folgen und mehr. Neu hier? Registriere ein kostenloses Konto.

Schnellzugriffe

Community Help
Find useful guides, FAQs, and documents to help you navigate and make the most of Esri Community.