Updating the notebooks

Author: AllenDowney

chapters/chap04.ipynb

@@ -1080,7 +1080,7 @@
  },
  {
  "cell_type": "markdown",
- "id": "d22e5334",
+ "id": "3a56643b",
  "metadata": {},
  "source": [
  "### Exercise\n",
@@ -1091,7 +1091,7 @@
  {
  "cell_type": "code",
  "execution_count": 57,
- "id": "ee4a5c6f",
+ "id": "be86eb71",
  "metadata": {
  "tags": []
  },
@@ -1141,8 +1141,8 @@
  },
  {
  "cell_type": "code",
- "execution_count": 51,
- "id": "89ce198a",
+ "execution_count": null,
+ "id": "f8cbf549",
  "metadata": {
  "tags": []
  },
@@ -1156,17 +1156,24 @@
  "jump(2*size)\n",
  "draw_pie(6, size)\n",
  "jump(2*size)\n",
- "draw_pie(7, size)\n",
- "\n",
- "\n",
- "with open(\"jupyturtle_pie.svg\", \"w\") as svg_file:\n",
- " svg_content = turtle.get_SVG()\n",
- " svg_file.write(svg_content)"
+ "draw_pie(7, size)"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 51,
+ "id": "89ce198a",
+ "metadata": {
+ "tags": []
+ },
+ "outputs": [],
+ "source": [
+ "# Solution goes here"
  ]
  },
  {
  "cell_type": "markdown",
- "id": "9ab5d08b",
+ "id": "e35f613a",
  "metadata": {},
  "source": [
  "### Exercise\n",
@@ -1177,7 +1184,7 @@
  {
  "cell_type": "code",
  "execution_count": 58,
- "id": "f00b40f9",
+ "id": "c8095531",
  "metadata": {
  "tags": []
  },
@@ -1232,8 +1239,8 @@
  },
  {
  "cell_type": "code",
- "execution_count": 53,
- "id": "4cfea3b0",
+ "execution_count": null,
+ "id": "8e92df6f",
  "metadata": {
  "tags": []
  },
@@ -1255,11 +1262,19 @@
  "angle = 85\n",
  "flower(n, radius, angle)\n",
  "\n",
- "render()\n",
- "\n",
- "with open(\"jupyturtle_flower.svg\", \"w\") as svg_file:\n",
- " svg_content = turtle.get_SVG()\n",
- " svg_file.write(svg_content)"
+ "render()"
+ ]
+ },
+ {
+ "cell_type": "code",
+ "execution_count": 53,
+ "id": "4cfea3b0",
+ "metadata": {
+ "tags": []
+ },
+ "outputs": [],
+ "source": [
+ "# Solution goes here"
  ]
  },
  {