Bug in FeatureLayerCollection.query_domains

In arcgis python api version 1.6.2, the FeatureLayerCollection.query_domains method generates an error. For example:

item = gis.content.get('ITEM_ID')
flc = FeatureLayerCollection.fromitem(item)
flc.query_domains([0])

produces this error:

---------------------------------------------------------------------------
TypeError                                 Traceback (most recent call last)
<ipython-input-30-31345fbf23ab> in <module>
----> 1 flc.query_domains([0])

~/anaconda3/envs/geo/lib/python3.7/site-packages/arcgis/features/layer.py in query_domains(self, layers)
   1908 
   1909         """
-> 1910         if not isinstance(layers (tuple, list)):
   1911             raise ValueError("The layer variable must be a list.")
   1912         url = "{base}/queryDomains".format(base=self._url)

TypeError: 'list' object is not callable

The error appears to be caused by a missing comma after layers in line 1910 of layer.py.

[mikiekelly]

As a workaround you can access domains this way:

from arcgis.gis import GIS


def process_layers_or_tables(layer_or_table):
    print(f'{layer_or_table.properties.name}: {layer_or_table.url}')
    for field in layer_or_table.properties.fields:
        print(f'\t{field.name} - {field.alias} - {field.type}')
        if 'domain' in field and field.domain is not None:
            print(f'\t\tDomain associated with field')
            if field.domain.type == 'codedValue':
                for coded_value in field.domain.codedValues:
                    print(f'\t\t\t{coded_value.name}')
            else:
                print(f'Not coded value domain: {field.domain}')


gis = GIS()

feature_layer = gis.content.get('90cf22bcbb30499c912264f5305be5b8')

for layer in feature_layer.layers:
    process_layers_or_tables(layer)

for table in feature_layer.tables:
    process_layers_or_tables(table)

[jlishnunn]

Thank you @mikiekelly

I re-purposed your function to create a list of coded domain values

def layer_or_table_domain_values(layer_or_table, field_name):
    arcpy.AddMessage(f'{layer_or_table.properties.name}: {layer_or_table.url}')
    field_names = [field.name for field in layer_or_table.properties.fields]
    arcpy.AddMessage(field_names)
    for field in layer_or_table.properties.fields:
        if field_name == field.name:
            arcpy.AddMessage(field.name)
            if 'domain' in field and field.domain is not None:
                arcpy.AddMessage('Domain associated with field')
                if field.domain.type == 'codedValue':
                    domain_values = [coded_value.name for coded_value in field.domain.codedValues]
                    arcpy.AddMessage(domain_values)
                else:
                    arcpy.AddMessage(f'Not coded value domain: {field.domain}')