import panel as pn
pn.extension()
The LiteralInput widget allows entering any Python literal using a text entry box whose contents are then parsed in Python. The widget only supports Python literal types. Optionally a type may be declared to validate the literal before updating the parameter.
Discover more on using widgets to add interactivity to your applications in the how-to guides on interactivity. Alternatively, learn how to set up callbacks and (JS-)links between parameters or how to use them as part of declarative UIs with Param.
For details on other options for customizing the component see the layout and styling how-to guides.
serializer (str['ast', 'json]): The serialization (and deserialization) method to use. 'ast' uses ast.literal_eval and 'json' uses json.loads and json.dumps.type (type or tuple(type)): A Python literal type (e.g. list, dict, set, int, float, bool, str)value: Parsed value of the indicated typedisabled (boolean): Whether the widget is editablename (str): The title of the widgetplaceholder (str): A placeholder string displayed when no value is enteredliteral_input = pn.widgets.LiteralInput(name='Literal Input (dict)', value={'key': [1, 2, 3]}, type=dict)
literal_input
LiteralInput.value returns a value of the evaluated type that can be read out and set like other widgets:
literal_input.value
The LiteralInput widget exposes a number of options which can be changed from both Python and Javascript. Try out the effect of these parameters interactively:
pn.Row(literal_input.controls(jslink=True), literal_input)