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non_data_variable

NonDataVariable​

from dara.core.interactivity.non_data_variable import NonDataVariable

class NonDataVariable(AnyVariable, abc.ABC)

NonDataVariable represents any variable that is not specifically designed to hold datasets (i.e. Variable, DerivedVariable, UrlVariable)

Arguments:

  • uid: the unique identifier for this variable; if not provided a random one is generated

Attributes​

  • uid: str

Methods​

list_item​

@property
def list_item()

Get a LoopVariable that represents the current item in the list. Should only be used in conjunction with the For component.

Note that it is a type of a Variable so it can be used in places where a regular Variable is expected.

By default, the entire list item is used as the item.

LoopVariable supports nested property access using get or index access i.e. []. You can mix and match those two methods to access nested properties as they are equivalent.

my_list = Variable(['foo', 'bar', 'baz'])

# Represents the entire item in the list
my_list.list_item

my_list_of_objects = Variable([
    {'id': 1, 'name': 'John', 'data': {'city': 'London', 'country': 'UK'}},
    {'id': 2, 'name': 'Jane', 'data': {'city': 'Paris', 'country': 'France'}},
])

# Represents the item 'name' property
my_list_of_objects.list_item['name']

# Represents the item 'data.country' property
my_list_of_objects.list_item.get('data')['country']