Class11 (OOP).ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Topic\n",
    "- Class\n",
    "- instance\n",
    "- Method\n",
    "- Attributes/properties\n",
    "- class variable\n",
    "- instance variable\n",
    "- inheritance\n",
    "- encupsolation\n",
    "- Abstraction\n",
    "- Ploymorphisim"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Linear Programming"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Hamza Asif\n"
     ]
    }
   ],
   "source": [
    "s1name = \"Ali\"\n",
    "s1fname = \"Hamza\"\n",
    "s1id = 1\n",
    "def s1login():pass\n",
    "def s1logout():pass\n",
    "def s1quiz_attemp():pass\n",
    "\n",
    "s2name = \"Kashif\"\n",
    "s2fname= \"Asif\"\n",
    "s2id = 2\n",
    "def s2login():pass\n",
    "def s2logout():pass\n",
    "def s2quiz_attemp():pass\n",
    "\n",
    "print(s1fname, s2fname)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": [
    "# OOP"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [],
   "source": [
    "class Student():\n",
    "    def __init__(self, sid, name, fname, course, fee):\n",
    "        self.sid = sid # attribute\n",
    "        self.name = name # attribute\n",
    "        self.fname = fname # attribute\n",
    "        self.course = course # attribute\n",
    "        self.fee = fee \n",
    "        print(\"successfully new instance created\")\n",
    "        \n",
    "    def login(self):\n",
    "        pass\n",
    "    \n",
    "    def logout(self):\n",
    "        pass\n",
    "    \n",
    "    def quiz_attemp(self):\n",
    "        pass\n",
    "    \n",
    "    def attendance_mark(self):\n",
    "        pass\n",
    "    \n",
    "\n",
    "        \n",
    "        \n",
    "\n",
    "s1 = Student(1,'A','B','C',0)\n",
    "\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [],
   "source": [
    "class Student():\n",
    "    def __init__(self, sid):\n",
    "        self.sid = sid # attribute\n",
    "        self.name = \"\" # attribute\n",
    "        self.fname = \"\" # attribute\n",
    "        self.course = \"\" # attribute\n",
    "        self.fee = 0 \n",
    "        \n",
    "    def login(self):\n",
    "        pass\n",
    "    \n",
    "    def logout(self):\n",
    "        pass\n",
    "    \n",
    "    def quiz_attemp(self):\n",
    "        pass\n",
    "    \n",
    "    def attendance_mark(self):\n",
    "        pass\n",
    "    \n",
    "\n",
    "        \n",
    "        \n",
    "\n",
    "s1 = Student(1)\n",
    "s2 = Student(2)\n",
    "s3 = Student(100)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "\n",
      "\n",
      "\n"
     ]
    }
   ],
   "source": [
    "print(s1.name,s2.name,s3.name, sep=\"\\n\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Ali\n",
      "Konain\n",
      "Hamza\n"
     ]
    }
   ],
   "source": [
    "s1.name = \"Ali\"\n",
    "s3.name = \"Hamza\"\n",
    "s2.name = \"Konain\"\n",
    "\n",
    "print(s1.name,s2.name,s3.name, sep=\"\\n\")\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['a', 'b', 'c']"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "data = list('abc')\n",
    "data\n",
    "data."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1\n",
      "2\n",
      "100\n"
     ]
    }
   ],
   "source": [
    "class Student():\n",
    "    def __init__(this, sid):\n",
    "        this.sid = sid\n",
    "        this.name = \"\"\n",
    "        this.fname = \"\"\n",
    "        this.course = \"\"\n",
    "        this.fee = 0\n",
    "        \n",
    "    def login(this):\n",
    "        pass\n",
    "    \n",
    "    def logout(this):\n",
    "        pass\n",
    "    \n",
    "    def quiz_attemp(this):\n",
    "        pass\n",
    "    \n",
    "    def attendance_mark(this):\n",
    "        pass\n",
    "        \n",
    "\n",
    "s1 = Student(1)\n",
    "s2 = Student(2)\n",
    "s3 = Student(100)\n",
    "\n",
    "print(s1.sid, s2.sid, s3.sid, sep=\"\\n\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1\n",
      "2\n",
      "100\n"
     ]
    }
   ],
   "source": [
    "class Student():\n",
    "    def __init__(0, sid):\n",
    "        0.sid = sid\n",
    "        0.name = \"\"\n",
    "        0.fname = \"\"\n",
    "        0.course = \"\"\n",
    "        0.fee = 0\n",
    "        \n",
    "    def login(0):\n",
    "        pass\n",
    "    \n",
    "    def logout(0):\n",
    "        pass\n",
    "    \n",
    "    def quiz_attemp(0):\n",
    "        pass\n",
    "    \n",
    "    def attendance_mark(0):\n",
    "        pass\n",
    "        \n",
    "\n",
    "s1 = Student(1)\n",
    "s2 = Student(2)\n",
    "s3 = Student(100)\n",
    "\n",
    "print(s1.sid, s2.sid, s3.sid, sep=\"\\n\")"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Class Variable"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "3"
      ]
     },
     "execution_count": 13,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "class Student(): # Class Name\n",
    "    \n",
    "    counter = 0 # Class Variable\n",
    "    \n",
    "    def __init__(self, sid):\n",
    "        self.sid = sid # Attributes/properties/field/DataMember\n",
    "        self.name = \"\"\n",
    "        self.fname = \"\"\n",
    "        self.course = \"\"\n",
    "        self.fee = 0 # Attributes/properties/field/DataMember\n",
    "        self.user=\"abc\"\n",
    "        Student.counter += 1\n",
    "        \n",
    "    def login(self, user_name, password):#Method/Action/Function\n",
    "        self.user = user_name\n",
    "        print(\"welcome \", self.user)\n",
    "    \n",
    "    def logout(self):\n",
    "        pass\n",
    "    \n",
    "    def quiz_attemp(self):\n",
    "        pass\n",
    "    \n",
    "    def attendance_mark(self):\n",
    "        pass\n",
    "    \n",
    "\n",
    "        \n",
    "        \n",
    "\n",
    "s1 = Student(1) # counter 1\n",
    "s2 = Student(2) # counter 2\n",
    "s3 = Student(100) # counter 3\n",
    "\n",
    "s1.counter"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "3"
      ]
     },
     "execution_count": 14,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "s3.counter"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "3"
      ]
     },
     "execution_count": 15,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "Student.counter"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 30,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "welcome  Qasim\n"
     ]
    }
   ],
   "source": [
    "s1.login(\"Qasim\",\"123\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "abcd\n"
     ]
    }
   ],
   "source": [
    "s1.DOB = \"abcd\"\n",
    "print(s1.DOB)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "metadata": {},
   "outputs": [],
   "source": [
    "del s1.DOB"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Inheritance"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 32,
   "metadata": {},
   "outputs": [],
   "source": [
    "class Parent():\n",
    "    def __init__(self):\n",
    "        self.name = \"\"\n",
    "        self.fname = \"\"\n",
    "    \n",
    "    def speak(self, words=\"\"):\n",
    "        print(words,\"...\")\n",
    "    \n",
    "    def eat(self, food=\"roti\"):\n",
    "        print(food)\n",
    "      \n",
    "\n",
    "class Child(Parent):\n",
    "    pass"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 34,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "ABC\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "''"
      ]
     },
     "execution_count": 34,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "p_obj1 = Parent()\n",
    "p_obj1.name = \"ABC\"\n",
    "print(p_obj1.name)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 36,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Pakistan zinda bad ...\n"
     ]
    }
   ],
   "source": [
    "c_obj1 = Child()\n",
    "c_obj1.speak(\"Pakistan zinda bad\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 39,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "FL\n"
     ]
    }
   ],
   "source": [
    "class Father():\n",
    "    def __init__(self):\n",
    "        self.sound = \"Fs\"\n",
    "        self.eye_color = \"Brown\"\n",
    "        \n",
    "    def speak(self):\n",
    "        print(\"Father Voice\")\n",
    "    \n",
    "    def listing(self):\n",
    "        print(\"FL\")\n",
    "    \n",
    "class Mother():\n",
    "    def __init__(self):\n",
    "        self.face = \"Mother\"\n",
    "        self.hair_color = \"Black\"\n",
    "        \n",
    "    def listing(self):\n",
    "        print(\"ML\")\n",
    "    \n",
    "    def abc(self):\n",
    "        print(\"MABC\")\n",
    "        \n",
    "class Child(Father, Mother):\n",
    "    pass\n",
    "\n",
    "asif = Child()\n",
    "asif.listing()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Polymorphism"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### Overloading"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 45,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1\n",
      "10\n"
     ]
    }
   ],
   "source": [
    "class A():\n",
    "    \n",
    "    def abc(self,*n):\n",
    "        print(sum(n))\n",
    "\n",
    "obj1 = A()\n",
    "obj1.abc(1)\n",
    "obj1.abc(1,3,2,4)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Over Riding"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 47,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Speak Function Class B\n"
     ]
    }
   ],
   "source": [
    "class A():\n",
    "    def speak(self):\n",
    "        print(\"Speak Function Class A\")\n",
    "        \n",
    "        \n",
    "class B(A):\n",
    "    def speak(self): # Over Riding\n",
    "        print(\"Speak Function Class B\")\n",
    "        \n",
    "obj1 = B()        \n",
    "obj1.speak()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Encopsoluation"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {},
   "outputs": [],
   "source": [
    "class A():\n",
    "    def __init__(self, name, age):\n",
    "        self.__sname = name\n",
    "        self.__age = age\n",
    "    \n",
    "    def display(self):\n",
    "        print(\"name:\", self.__sname)\n",
    "        print(\"Age:\",self.__age)\n",
    "        \n",
    "        \n",
    "    def change(self, a, b):\n",
    "        self.__sname = a\n",
    "        self.__age = b\n",
    "        \n",
    "    def __info(self):\n",
    "        print(\"Hello world\")\n",
    "        \n",
    "    def abc(self):\n",
    "        self.__info()\n",
    "\n",
    "obj1 = A(\"Ali\", 25) \n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "ename": "AttributeError",
     "evalue": "'A' object has no attribute 'sname'",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mAttributeError\u001b[0m                            Traceback (most recent call last)",
      "\u001b[0;32m<ipython-input-5-63bb28389f86>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mobj1\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0msname\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[0;31mAttributeError\u001b[0m: 'A' object has no attribute 'sname'"
     ]
    }
   ],
   "source": [
    "obj1.sname"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "ename": "AttributeError",
     "evalue": "'A' object has no attribute '__sname'",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mAttributeError\u001b[0m                            Traceback (most recent call last)",
      "\u001b[0;32m<ipython-input-6-fa8f2de7df4a>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mobj1\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0m__sname\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[0;31mAttributeError\u001b[0m: 'A' object has no attribute '__sname'"
     ]
    }
   ],
   "source": [
    "obj1.__sname"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'Ali'"
      ]
     },
     "execution_count": 7,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "obj1._A__sname"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "ename": "AttributeError",
     "evalue": "'A' object has no attribute 'A__sname'",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mAttributeError\u001b[0m                            Traceback (most recent call last)",
      "\u001b[0;32m<ipython-input-9-364f65f80185>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mobj1\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mA__sname\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[0;31mAttributeError\u001b[0m: 'A' object has no attribute 'A__sname'"
     ]
    }
   ],
   "source": [
    "obj1.A__sname"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "name: Ali\n",
      "Age: 25\n"
     ]
    }
   ],
   "source": [
    "obj1.display()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "name: Asif\n",
      "Age: 30\n"
     ]
    }
   ],
   "source": [
    "obj1.change(\"Asif\", 30)\n",
    "\n",
    "obj1.display()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [
    {
     "ename": "AttributeError",
     "evalue": "'A' object has no attribute 'info'",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mAttributeError\u001b[0m                            Traceback (most recent call last)",
      "\u001b[0;32m<ipython-input-14-3a0370b73e95>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mobj1\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0minfo\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[0;31mAttributeError\u001b[0m: 'A' object has no attribute 'info'"
     ]
    }
   ],
   "source": [
    "obj1.info()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Hellow\n"
     ]
    }
   ],
   "source": [
    "obj1.abc()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Abstract Class"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "metadata": {},
   "outputs": [],
   "source": [
    "class A: # Abstract class\n",
    "    def __init__(self, a, b):\n",
    "        self.a = a\n",
    "        self.b = b\n",
    "        \n",
    "class B(A):\n",
    "    pass"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "metadata": {},
   "outputs": [],
   "source": [
    "obj1 = A(2,5)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 21,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "2\n",
      "5\n"
     ]
    }
   ],
   "source": [
    "print(obj1.a)\n",
    "print(obj1.b)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "metadata": {},
   "outputs": [],
   "source": [
    "obj2 = B(7,9)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 24,
   "metadata": {},
   "outputs": [
    {
     "ename": "TypeError",
     "evalue": "Can't instantiate abstract class A with abstract methods abc",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[0;32m<ipython-input-24-b8c886ecbc08>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[1;32m     14\u001b[0m     \u001b[0;32mpass\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m     15\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m---> 16\u001b[0;31m \u001b[0mobj1\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mA\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;36m5\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m7\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[0;31mTypeError\u001b[0m: Can't instantiate abstract class A with abstract methods abc"
     ]
    }
   ],
   "source": [
    "from abc import ABC, abstractmethod\n",
    "\n",
    "class A(ABC):\n",
    "    \n",
    "    def __init__(self, a, b):\n",
    "        self.a = a\n",
    "        self.b = b\n",
    "        \n",
    "    @abstractmethod\n",
    "    def abc():\n",
    "        pass\n",
    "        \n",
    "class B(A):\n",
    "    pass\n",
    "\n",
    "obj1 = A(5,7)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "metadata": {},
   "outputs": [
    {
     "ename": "TypeError",
     "evalue": "Can't instantiate abstract class B with abstract methods abc",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[0;32m<ipython-input-25-b894ffb95d50>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0mobj2\u001b[0m \u001b[0;34m=\u001b[0m \u001b[0mB\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;36m5\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0;36m7\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[0;31mTypeError\u001b[0m: Can't instantiate abstract class B with abstract methods abc"
     ]
    }
   ],
   "source": [
    "obj2 = B(5, 7)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "metadata": {},
   "outputs": [
    {
     "ename": "TypeError",
     "evalue": "Can't instantiate abstract class Human with abstract methods __init__",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[0;32m<ipython-input-26-d1dbfed76b33>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[1;32m     13\u001b[0m         \u001b[0;32mreturn\u001b[0m \u001b[0;34m\"Objece name is {} {} old.\"\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mformat\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mname\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0mself\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mage\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m     14\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0;32m---> 15\u001b[0;31m \u001b[0mp1\u001b[0m\u001b[0;34m=\u001b[0m\u001b[0mHuman\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[0m\u001b[1;32m     16\u001b[0m \u001b[0mp1\u001b[0m\u001b[0;34m.\u001b[0m\u001b[0mdisplay\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;34m'qasim'\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m25\u001b[0m\u001b[0;34m)\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n",
      "\u001b[0;31mTypeError\u001b[0m: Can't instantiate abstract class Human with abstract methods __init__"
     ]
    }
   ],
   "source": [
    "from abc import ABC, abstractmethod\n",
    "\n",
    "class Human(ABC): \n",
    "    \n",
    "    @abstractmethod\n",
    "    def __init__(self):\n",
    "        self.name=None\n",
    "        self.age=None\n",
    "    \n",
    "    def display(self,name,age):\n",
    "        self.name=name\n",
    "        self.age=age\n",
    "        return \"Objece name is {} {} old.\".format(self.name,self.age)\n",
    "\n",
    "p1=Human()\n",
    "p1.display('qasim',25)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "metadata": {},
   "outputs": [],
   "source": [
    "\n",
    "class Male(Human):\n",
    "    \n",
    "    def __init__(self):\n",
    "        self.name='qasim'\n",
    "        self.fname='aslam'\n",
    "    \n",
    "    def laughter(self):\n",
    "        return 'Hahahahahah!'\n",
    "\n",
    "p1=Male()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'C:\\\\Users\\\\Student-PC\\\\Desktop\\\\python\\\\class11(OOP)'"
      ]
     },
     "execution_count": 16,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "pwd()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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