Included Section on Sets

Author: leriomaggio

03 List and Tuples and Sets.ipynb

@@ -4942,20 +4942,179 @@
     "A set object is an unordered collection of distinct hashable objects. Common uses include membership testing, removing duplicates from a sequence, and computing mathematical operations such as intersection, union, difference, and symmetric difference."
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": 1,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{'circle', 'square', 'triangle'}"
+      ]
+     },
+     "execution_count": 1,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "shapes = ['circle','square','triangle','circle']\n",
+    "set_of_shapes = set(shapes)\n",
+    "set_of_shapes"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 7,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "circle\n",
+      "square\n",
+      "polygon\n",
+      "triangle\n"
+     ]
+    }
+   ],
+   "source": [
+    "shapes = {'circle','square','triangle','circle'}\n",
+    "for shape in set_of_shapes:\n",
+    "    print(shape)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 6,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "{'circle', 'square', 'polygon', 'triangle'}\n"
+     ]
+    }
+   ],
+   "source": [
+    "set_of_shapes.add('polygon') \n",
+    "print(set_of_shapes)"
+   ]
+  },
   {
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<a name='set_operations'></a>Defining tuples, and accessing elements\n",
-    "---"
+    "## Exists (Check)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 2,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Circle is in the set:  True\n",
+      "Rhombus is in the set: False\n"
+     ]
+    }
+   ],
+   "source": [
+    "# Test if circle is IN the set (i.e. exist)\n",
+    "print('Circle is in the set: ', ('circle' in set_of_shapes))\n",
+    "print('Rhombus is in the set:', ('rhombus' in set_of_shapes))"
    ]
   },
   {
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "<a name='exercise_set'></a>Exercise\n",
-    "---"
+    "## Operations"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 3,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{'circle', 'triangle'}"
+      ]
+     },
+     "execution_count": 3,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "favourites_shapes = set(['circle','triangle','hexagon'])\n",
+    "\n",
+    "# Intersection\n",
+    "set_of_shapes.intersection(favourites_shapes)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 4,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{'circle', 'hexagon', 'square', 'triangle'}"
+      ]
+     },
+     "execution_count": 4,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Union\n",
+    "set_of_shapes.union(favourites_shapes)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 5,
+   "metadata": {
+    "collapsed": false
+   },
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "{'square'}"
+      ]
+     },
+     "execution_count": 5,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "# Difference\n",
+    "set_of_shapes.difference(favourites_shapes)"
    ]
   },
   {