{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "import panel as pn\n",
    "pn.extension()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "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.\n",
    "\n",
    "For more information about listening to widget events and laying out widgets refer to the [widgets user guide](../../user_guide/Widgets.ipynb). Alternatively you can learn how to build GUIs by declaring parameters independently of any specific widgets in the [param user guide](../../user_guide/Param.ipynb). To express interactivity entirely using Javascript without the need for a Python server take a look at the [links user guide](../../user_guide/Param.ipynb).\n",
    "\n",
    "#### Parameters:\n",
    "\n",
    "For layout and styling related parameters see the [customization user guide](../../user_guide/Customization.ipynb).\n",
    "\n",
    "##### Core\n",
    "\n",
    "* **``serializer``** (str['ast', 'json]): The serialization (and deserialization) method to use. 'ast' uses `ast.literal_eval` and 'json' uses `json.loads` and `json.dumps`.\n",
    "* **``type``** (type or tuple(type)): A Python literal type (e.g. list, dict, set, int, float, bool, str)\n",
    "* **``value``**: Parsed value of the indicated type\n",
    "\n",
    "##### Display\n",
    "\n",
    "* **``disabled``** (boolean): Whether the widget is editable\n",
    "* **``name``** (str): The title of the widget\n",
    "* **``placeholder``** (str): A placeholder string displayed when no value is entered\n",
    "\n",
    "___"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "literal_input = pn.widgets.LiteralInput(name='Literal Input (dict)', value={'key': [1, 2, 3]}, type=dict)\n",
    "literal_input"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "``LiteralInput.value`` returns a value of the evaluated type that can be read out and set like other widgets:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "literal_input.value"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Controls\n",
    "\n",
    "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:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "pn.Row(literal_input.controls(jslink=True), literal_input)"
   ]
  }
 ],
 "metadata": {
  "language_info": {
   "name": "python",
   "pygments_lexer": "ipython3"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 4
}
