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Chapter 31 Advanced Class Topics.ipynb

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+{
+ "cells": [
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "Advanced OOP Class Topics\n",
+    "------------"
+   ]
+  },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "- subclassing built-in types\n",
+    "- \"new style\" class changes and extensions\n",
+    "- static and class methods\n",
+    "- function decorators\n",
+    "- more"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 16,
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "class Set:\n",
+    "    def __init__(self, value=[]):\n",
+    "        self.data = []\n",
+    "        self.concat(value)\n",
+    "    def intersect(self, other):\n",
+    "        res = []\n",
+    "        for x in self.data:\n",
+    "            if x in other:\n",
+    "                res.append(x)\n",
+    "        return Set(res)\n",
+    "    def union(self, other):\n",
+    "        res = self.data[:]\n",
+    "        for x in other.data:\n",
+    "            if not x in res:\n",
+    "                res.append(x)\n",
+    "        return Set(res)\n",
+    "    def concat(self, value):\n",
+    "        for x in value:\n",
+    "            if not x in self.data:\n",
+    "                self.data.append(x)\n",
+    "    def __len__(self): return len(self.data)\n",
+    "    def __getitem(self,key): return self.data[key]\n",
+    "    def __and__(self, other): return self.intersect(other)\n",
+    "    def __or__(self, other): return self.union(other)\n",
+    "    def __repr__(self): return \"Set:\" + repr(self.data)"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 17,
+   "metadata": {},
+   "outputs": [
+    {
+     "data": {
+      "text/plain": [
+       "[1, 3, 5, 7]"
+      ]
+     },
+     "execution_count": 17,
+     "metadata": {},
+     "output_type": "execute_result"
+    }
+   ],
+   "source": [
+    "x = Set([1,3,5,7])\n",
+    "x.data"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 18,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Set:[1, 3, 5, 7, 4]\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(x.union(Set([1,4,7])))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": 19,
+   "metadata": {},
+   "outputs": [
+    {
+     "name": "stdout",
+     "output_type": "stream",
+     "text": [
+      "Set:[1, 3, 5, 7, 4]\n"
+     ]
+    }
+   ],
+   "source": [
+    "print(x | Set([1,4,7]))"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "metadata": {},
+   "outputs": [],
+   "source": []
+  }
+ ],
+ "metadata": {
+  "kernelspec": {
+   "display_name": "Python 3",
+   "language": "python",
+   "name": "python3"
+  },
+  "language_info": {
+   "codemirror_mode": {
+    "name": "ipython",
+    "version": 3
+   },
+   "file_extension": ".py",
+   "mimetype": "text/x-python",
+   "name": "python",
+   "nbconvert_exporter": "python",
+   "pygments_lexer": "ipython3",
+   "version": "3.8.5"
+  }
+ },
+ "nbformat": 4,
+ "nbformat_minor": 4
+}