Add missing packages (for graph drawing)

Author: alexanderskulikov

notebooks/99_plow_truck.ipynb

@@ -25,10 +25,31 @@
    "execution_count": 1,
    "id": "7eb64415",
    "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "The operation couldn’t be completed. Unable to locate a Java Runtime that supports apt.\n",
+      "Please visit http://www.java.com for information on installing Java.\n",
+      "\n",
+      "zsh:1: command not found: pip\n"
+     ]
+    }
+   ],
+   "source": [
+    "!apt install libgraphviz-dev\n",
+    "!pip install pygraphviz\n",
+    "import networkx as nx"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "id": "c6c7b957",
+   "metadata": {},
    "outputs": [],
    "source": [
-    "import networkx as nx\n",
-    "\n",
     "grid = nx.MultiGraph(nx.grid_2d_graph(5, 5))\n",
     "grid = nx.eulerize(grid)\n",
     "\n",
@@ -39,15 +60,15 @@
   },
   {
    "cell_type": "markdown",
-   "id": "7df9a218",
+   "id": "3c7b893d",
    "metadata": {},
    "source": [
     "![](plow_truck_grid.png)"
    ]
   },
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 7,
    "id": "5a3767fe",
    "metadata": {},
    "outputs": [