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.
For more information about listening to widget events and laying out widgets refer to the widgets user guide. Alternatively you can learn how to build GUIs by declaring parameters independently of any specific widgets in the param user guide. To express interactivity entirely using Javascript without the need for a Python server take a look at the links user guide.
For layout and styling related parameters see the customization user guide.
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)