Jupyter notebooks are ready for flatland3.

But they should be overworked. Might just one example per use case would be much more clear. TODO - cleanup

notebooks/notebook-list

@@ -4,6 +4,5 @@ simple_rendering_demo.ipynb
 flatland_animate.ipynb
 render_episode.ipynb
 scene_editor.ipynb
-test_collision.ipynb
 test_saved_envs.ipynb
 test_service.ipynb

notebooks/test_collision.ipynb

-{
- "cells": [
-  {
-   "cell_type": "markdown",
-   "metadata": {},
-   "source": [
-    "# Test Collisions\n",
-    "A visual test of a \"rear-shunt\" collision, to ensure that the agent does not get marked as collided permananently."
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "%load_ext autoreload\n",
-    "%autoreload 2\n",
-    "from IPython.core import display \n",
-    "display.display(display.HTML(\"<style>.container { width:95% !important; }</style>\"))"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "import PIL\n",
-    "from IPython import display\n",
-    "from ipycanvas import canvas\n",
-    "import time"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "from flatland.envs import malfunction_generators as malgen\n",
-    "from flatland.envs.agent_utils import EnvAgent\n",
-    "from flatland.envs import rail_generators as rail_gen\n",
-    "from flatland.envs import agent_chains as ac\n",
-    "from flatland.envs.rail_env import RailEnv, RailEnvActions\n",
-    "from flatland.envs.persistence import RailEnvPersister\n",
-    "from flatland.utils.rendertools import RenderTool\n",
-    "from flatland.utils import env_edit_utils as eeu\n",
-    "from flatland.utils import jupyter_utils as ju"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "env, envModel = eeu.makeTestEnv(\"concentric_loops\", nAg=2, remove_agents_at_target=True)\n",
-    "behaviour = ju.ForwardWithPause(env, [ju.AgentPause(0, 12, 5)])\n",
-    "oEC = ju.EnvCanvas(env, behaviour)\n",
-    "env.reset(regenerate_rail=False)\n",
-    "oEC.show()\n",
-    "for i in range(25):\n",
-    "    oEC.step()\n",
-    "    oEC.render()\n",
-    "    time.sleep(0.1)"
-   ]
-  },
-  {
-   "cell_type": "code",
-   "execution_count": null,
-   "metadata": {},
-   "outputs": [],
-   "source": [
-    "dAgStateExpected = {0: (8, 6, 3), 1: (8, 7, 3)} \n",
-    "\n",
-    "dAgState={}\n",
-    "for iAg, ag in enumerate(env.agents):\n",
-    "    dAgState[iAg] = (*ag.position, ag.direction)\n",
-    "print(\"Expected:\", dAgStateExpected)\n",
-    "print(\"Actual:\", dAgState)\n",
-    "assert dAgState == dAgStateExpected"
-   ]
-  }
- ],
- "metadata": {
-  "hide_input": false,
-  "kernelspec": {
-   "display_name": "Python 3",
-   "language": "python",
-   "name": "python3"
-  },
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-    "version": 3
-   },
-   "file_extension": ".py",
-   "mimetype": "text/x-python",
-   "name": "python",
-   "nbconvert_exporter": "python",
-   "pygments_lexer": "ipython3",
-   "version": "3.6.8"
-  },
-  "latex_envs": {
-   "LaTeX_envs_menu_present": true,
-   "autoclose": false,
-   "autocomplete": true,
-   "bibliofile": "biblio.bib",
-   "cite_by": "apalike",
-   "current_citInitial": 1,
-   "eqLabelWithNumbers": true,
-   "eqNumInitial": 1,
-   "hotkeys": {
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-    "itemize": "Ctrl-I"
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-   "title_cell": "Table of Contents",
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-    }
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