polymorphism.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [],
   "source": [
    "class Dog():\n",
    "    \n",
    "    def __init__(self,name):\n",
    "        self.name = name\n",
    "        \n",
    "    def speak(self):\n",
    "        return self.name + \" says woof!\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [],
   "source": [
    "class Cat():\n",
    "    \n",
    "    def __init__(self,name):\n",
    "        self.name = name\n",
    "        \n",
    "    def speak(self):\n",
    "        return self.name + \" says meow!\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Niko says woof!\n"
     ]
    }
   ],
   "source": [
    "niko = Dog(\"Niko\")\n",
    "felix = Cat(\"felix\")\n",
    "\n",
    "print(niko.speak())"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "felix says meow!\n"
     ]
    }
   ],
   "source": [
    "print(felix.speak())"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "<class '__main__.Dog'>\n",
      "<class 'str'>\n",
      "<class '__main__.Cat'>\n",
      "<class 'str'>\n"
     ]
    }
   ],
   "source": [
    "for pet in [niko,felix]:\n",
    "    print(type(pet))\n",
    "    print(type(pet.speak()))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [],
   "source": [
    "class Animal():\n",
    "    \n",
    "    def __init__(self,name):\n",
    "        self.name = name\n",
    "    \n",
    "    def speak(self):\n",
    "        raise NotImplementedError(\"Subclass must implement this abstract method\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [],
   "source": [
    "class Dog(Animal):\n",
    "    \n",
    "    def speak(self):\n",
    "        return self.name + \" says woof!\""
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "metadata": {},
   "outputs": [],
   "source": [
    "fido = Dog(\"fido\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'fido says woof!'"
      ]
     },
     "execution_count": 17,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "fido.speak()"
   ]
  },
  {
   "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": "3.6.5"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 2
}