Add the deoms

Author: dou-du

demos/explanation.png

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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "# widget-code-input demos\n",
+    "\n",
+    "You can visualize here a few demos of the `widget-code-input` widget for Jupyter, a widget that allows you to write snippets of code in the form of a function, and then test them.\n",
+    "\n",
+    "This widget is best used in combination with the [appmode](https://pypi.org/project/appmode/) plugin for Jupyter.\n",
+    "\n",
+    "Click on the headers to go to the respective demo."
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## [Simple showcase](./showcase.ipynb)\n",
+    "This demo is a simple showcase of the functionality of this widget.\n",
+    "It shows:\n",
+    "\n",
+    "- how to use the widget\n",
+    "- how to get and set the content of the function body from python\n",
+    "- how to monitor events from python (e.g. perform on operation in python every time the code is changed by the user)\n",
+    "- that it is possible in insert multiple, independent widgets in the same notebook\n",
+    "- how to obtain the function object from the widget and how to run it"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "## Exercise: compute the point at which a projectile would hit the ground \n",
+    "### [Non-zooming version](./projectile-inline.ipynb) - [Interactive version](./projectile-notebook.ipynb)\n",
+    "This demo shows a possible exercise for students: given the initial parameters of a projectile (height of launch, velocity), ask the student to write the function to compute the position where the projectile will hit the ground."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 2",
+   "language": "python",
+   "name": "python2"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.6.5"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 2
+}