Add a notebook that shows how to plot shapes

lessons/python/7a_shapes.ipynb

@@ -0,0 +1,168 @@
+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "id": "db296251-f903-49cb-a88d-41ae7a486826",
+   "metadata": {},
+   "source": [
+    "# Display a `Shape`"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "442ba2bc-7d7d-4353-ad87-4a458f4ae385",
+   "metadata": {},
+   "source": [
+    "This notebook shows how to use Matplotlib to display a shape from the OOP lesson.\n",
+    "\n",
+    "Start with imports of Matplotlib and a shape from the OOP lesson; here, the `Rectangle`."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "179c186d-95c4-4aa5-8bf5-700d014055cc",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "import matplotlib.pyplot as plt\n",
+    "\n",
+    "from shapes.rectangle import Rectangle"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "cf25341c-ea78-4010-95b7-35fc01fa4578",
+   "metadata": {},
+   "source": [
+    "Create an instance of `Rectangle`."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "6e227251-59f0-4036-b5b5-34a435cc66dc",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "rectangle = Rectangle(lower_left=(2.0, 1.0), width=2.0, height=3.0)"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "19a0ebb5-31ba-4349-a1b6-43eba5ebf635",
+   "metadata": {},
+   "source": [
+    "Show the coordinates of the rectangle's vertices."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "4f1c4892-282c-4034-9fe9-4b3db141938a",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "rectangle.x"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "324acca7-5549-4c08-a4ed-041604ae7167",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "rectangle.y"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "bea83f02-c705-48f8-bd7c-86134cfdba79",
+   "metadata": {},
+   "source": [
+    "To close the polygon for plotting,\n",
+    "make new variables, `x` and `y`,\n",
+    "that repeat the first coordinate pair."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "bf863b2f-ea7e-4d01-96f2-5d0bd43275ef",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "x = [*rectangle.x, rectangle.x[0]]\n",
+    "x"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "14d1d252-d6a2-4e16-85b8-81930de96491",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "y = [*rectangle.y, rectangle.y[0]]\n",
+    "y"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "id": "5558ef85-1ea6-4036-9749-7b56d46db928",
+   "metadata": {},
+   "source": [
+    "Plot the result."
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "9bea1a1b-bb8e-4df1-9e8d-460cf6ab23c5",
+   "metadata": {
+    "tags": []
+   },
+   "outputs": [],
+   "source": [
+    "plt.figure()\n",
+    "plt.xlim(0, 5)\n",
+    "plt.ylim(0, 5)\n",
+    "plt.plot(x, y)"
+   ]
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "CSDMS",
+   "language": "python",
+   "name": "csdms"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.11.3"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 5
+}