170808화_컴공입문_10일차_양태형선생님.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "#openpyxl이 안되는 사람들은 github.com/ythwork/css_3rd/procedure/class_1.dat을 올렸으니 그 파일로 해 볼것\n",
    "#CSS_3rd/week3/day1/computer.ipynb\n",
    "#에러났으므로 어제 작성한 아래의 라이브 코딩을 debugging해야함. \n",
    "#github에 수정판 올릴 예정이므로 다운받아서 확인할것\n",
    "class Person:\n",
    "    #class member\n",
    "    planet = 'Earth'\n",
    "    \n",
    "    #멤버 초기화\n",
    "    def __init__(self, name, age):\n",
    "        #instane member\n",
    "        self.name = name\n",
    "        self.age = age\n",
    "        self.nationality = None\n",
    "        \n",
    "    def __del__(self):\n",
    "        pass\n",
    "    #instance method : 객체가 가지는 기능, 행동(behavior)\n",
    "    def eat(self, food):\n",
    "        print('{} eats {}'.format(self.name, food))\n",
    "    \n",
    "    def sleep(self, hour):\n",
    "        pass"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [],
   "source": [
    "#에러났으므로 어제 작성한 아래의 라이브 코딩을 debugging해야함.  \n",
    "class Computer:\n",
    "    def __init__(self, cpu, ram):\n",
    "        self.CPU = cpu\n",
    "        self.RAM = ram\n",
    "        self.mem = []\n",
    "        self.send_data = None\n",
    "        self.receive_data = None\n",
    "        \n",
    "    def get_data_from_user(self):\n",
    "        s = input(\"string : \")\n",
    "        self.send_data = s\n",
    "        \n",
    "    def get_send_data(self):\n",
    "        return self.send_data\n",
    "    \n",
    "    def message_sender(self, other):\n",
    "        if not self.send_data:\n",
    "            return False\n",
    "        else:\n",
    "            res = other.message_receiver(self)\n",
    "            self.send_data = None\n",
    "            return res\n",
    "            \n",
    "    def message_receiver(self, other):\n",
    "        if self.receive_data:\n",
    "            return False\n",
    "        else:\n",
    "            self.receive_data = other.get_send_data()\n",
    "            if self.receive_data:\n",
    "                #추가된 코드\n",
    "                self.mem.append(self.receive_data)\n",
    "                self.receive_data = None\n",
    "                return True\n",
    "            else:\n",
    "                return False\n",
    "            \n",
    "    def get_receive_data(self):\n",
    "        return self.receive_data\n",
    "    \n",
    "    def __str__(self):\n",
    "        if not self.mem:\n",
    "            return 'No data'\n",
    "        else:\n",
    "            return str(self.mem)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "class Base:\n",
    "    def __init__(self, n1,n2):\n",
    "        #n은 이제부터 instance member가 되었음.\n",
    "        self.x= n1\n",
    "        self.__y=n2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "ename": "TypeError",
     "evalue": "__init__() missing 1 required positional argument: 'n2'",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-9-e8270720816c>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mb\u001b[0m\u001b[1;33m=\u001b[0m\u001b[0mBase\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;36m5\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mTypeError\u001b[0m: __init__() missing 1 required positional argument: 'n2'"
     ]
    }
   ],
   "source": [
    "b=Base(5)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
     "ename": "NameError",
     "evalue": "name 'x' is not defined",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-10-e4b671749a54>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mprint\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mb\u001b[0m\u001b[1;33m,\u001b[0m\u001b[0mx\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m: name 'x' is not defined"
     ]
    }
   ],
   "source": [
    "print(b,x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "ename": "AttributeError",
     "evalue": "'Base' object has no attribute '__y'",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mAttributeError\u001b[0m                            Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-11-c8a27dfd2803>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mprint\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mb\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0m__y\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mAttributeError\u001b[0m: 'Base' object has no attribute '__y'"
     ]
    }
   ],
   "source": [
    "print(b.__y)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'x': 5}"
      ]
     },
     "execution_count": 17,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "b.__dict__ #정보은닉처럼 보이지만 아님. 파이썬이 알아서 이름을 바꿔서 \n",
    "#정보은닉처럼 보이게 하는것을 name mangling이라고함. \n",
    "#__name: 이 멤버는 내부적으로만 쓸거라고 예약을 걸어놓음. \n",
    "#파이썬이 말하길 사용자(=객체를 만들어 쓰는 사람)야! \n",
    "#외부에서 멤버에 접근하지말고 엑세스 함수로만 접근해다오. 라고 부탁하고 있음. \n",
    "#C++에선 객체를 통해서 아예접근이 안되지만 파이썬에서는 부탁만 해서 외부에서 웬만하면 접근하지 말라고 부탁함. \n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 18,
   "metadata": {},
   "outputs": [],
   "source": [
    "class Base:\n",
    "    def __init__(self, n1,n2):\n",
    "        #n은 이제부터 instance member가 되었음.\n",
    "        self.x= n1\n",
    "        self.__y=n2\n",
    "        \n",
    "    def f(self):\n",
    "        print('f is ececuted!')\n",
    "    #내부에서만 사용: ie private이랑 같음.\n",
    "    def __g(self):\n",
    "        print('__g is executed!')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "metadata": {},
   "outputs": [
    {
     "ename": "AttributeError",
     "evalue": "'Base' object has no attribute '_Base__g'",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mAttributeError\u001b[0m                            Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-19-92ad5f5eb6b5>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mb\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0m_Base__g\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mAttributeError\u001b[0m: 'Base' object has no attribute '_Base__g'"
     ]
    }
   ],
   "source": [
    "b._Base__g()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 20,
   "metadata": {},
   "outputs": [
    {
     "ename": "SyntaxError",
     "evalue": "invalid syntax (<ipython-input-20-ba6a1913ac80>, line 9)",
     "output_type": "error",
     "traceback": [
      "\u001b[1;36m  File \u001b[1;32m\"<ipython-input-20-ba6a1913ac80>\"\u001b[1;36m, line \u001b[1;32m9\u001b[0m\n\u001b[1;33m    def get_x(self)\u001b[0m\n\u001b[1;37m                   ^\u001b[0m\n\u001b[1;31mSyntaxError\u001b[0m\u001b[1;31m:\u001b[0m invalid syntax\n"
     ]
    }
   ],
   "source": [
    "class Base:\n",
    "    def __init__(self, n1,n2):\n",
    "        #n은 이제부터 instance member가 되었음.\n",
    "        self.x= n1\n",
    "        self.__y=n2\n",
    "    #외부에 공개\n",
    "    #숨겨진 멤버에 접그하는 함수\n",
    "    #access function : 이걸 문법적으로 정리한것을 property라고함. \n",
    "    def get_x(self)\n",
    "    \n",
    "    def f(self):\n",
    "        print('f is ececuted!')\n",
    "    #내부에서만 사용: ie private이랑 같음.\n",
    "    def __g(self):\n",
    "        print('__g is executed!')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 21,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "#객체(object) vs 인스턴스(instance)\n",
    "##1. 위의 둘을 똑같다고 보기도함. 왜냐하면 같은 메모리 공간을 가리키므로.\n",
    "##2. but 객체는 클래스를 염두해두지않고 메모리공간 자체를 부름. \n",
    "    ##이 객체는 person이라는 클래스의 인스턴스다라고 부르면 클래스의 개념이 추가되어 있는것임. \n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "class Base:\n",
    "    a=10\n",
    "    b=20\n",
    "    def __init__(self, x,y):\n",
    "        #instance의 멤버니까 테이블에 없을 것이다.\n",
    "        self.x=x\n",
    "        self.y=y  \n",
    "        \n",
    "    def show_cls_member(self):\n",
    "        print(a,b)\n",
    "        \n",
    "    def f(self):\n",
    "        print('f')\n",
    "        \n",
    "    def g(self):\n",
    "        print('g')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 26,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "mappingproxy({'__dict__': <attribute '__dict__' of 'Base' objects>,\n",
       "              '__doc__': None,\n",
       "              '__init__': <function __main__.Base.__init__>,\n",
       "              '__module__': '__main__',\n",
       "              '__weakref__': <attribute '__weakref__' of 'Base' objects>,\n",
       "              'a': 10,\n",
       "              'b': 20,\n",
       "              'f': <function __main__.Base.f>,\n",
       "              'g': <function __main__.Base.g>,\n",
       "              'show_cls_member': <function __main__.Base.show_cls_member>})"
      ]
     },
     "execution_count": 26,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "#클래스 Base의 네임스페이스를 보여준다\n",
    "Base.__dict__"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "#인스턴스 만들기\n",
    "b=Base(1,2)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 28,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'x': 1, 'y': 2}"
      ]
     },
     "execution_count": 28,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "b.__dict__ #객체의 네임스페이스에는 함수를 안 가지고 있음. but 클래스의 네임공간에 접근해서 이용하는 것임. \n",
    "#즉 모든객체는 namespace를 갖는다(변수, 함수가 저장되어 있음. )\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 31,
   "metadata": {},
   "outputs": [],
   "source": [
    "#즉 모든객체는 namespace를 갖는다(변수, 함수가 저장되어 있음. )\n",
    "def func(x): #함수도 객체다\n",
    "    return x"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 32,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "func.a=10\n",
    "func.b=20"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 33,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'a': 10, 'b': 20}"
      ]
     },
     "execution_count": 33,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "func.__dict__"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 34,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "#iterator class:\n",
    "##1. __iter__ 메서드를 가지고 있어야함.\n",
    "##2. __next__ 메서드를 가지고 있어야함.\n",
    "##3. StopIteration이라는 에러를 내야함. "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 35,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "li=[1,2,3,4,5,]\n",
    "it=iter(li)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 36,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "<list_iterator at 0x17d4050>"
      ]
     },
     "execution_count": 36,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "it"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 42,
   "metadata": {},
   "outputs": [
    {
     "ename": "StopIteration",
     "evalue": "",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mStopIteration\u001b[0m                             Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-42-2cdb14c0d4d6>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mnext\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mit\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mStopIteration\u001b[0m: "
     ]
    }
   ],
   "source": [
    "next(it)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 44,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['__class__',\n",
       " '__delattr__',\n",
       " '__dir__',\n",
       " '__doc__',\n",
       " '__eq__',\n",
       " '__format__',\n",
       " '__ge__',\n",
       " '__getattribute__',\n",
       " '__gt__',\n",
       " '__hash__',\n",
       " '__init__',\n",
       " '__init_subclass__',\n",
       " '__iter__',\n",
       " '__le__',\n",
       " '__length_hint__',\n",
       " '__lt__',\n",
       " '__ne__',\n",
       " '__new__',\n",
       " '__next__',\n",
       " '__reduce__',\n",
       " '__reduce_ex__',\n",
       " '__repr__',\n",
       " '__setattr__',\n",
       " '__setstate__',\n",
       " '__sizeof__',\n",
       " '__str__',\n",
       " '__subclasshook__']"
      ]
     },
     "execution_count": 44,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "it=iter(li) \n",
    "dir(it) #그 안에 __iter__, __next__가 있음을 확인할것"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 47,
   "metadata": {},
   "outputs": [],
   "source": [
    "class Counter:\n",
    "    def __init__(self, low, high):\n",
    "        self.current=low\n",
    "        self.high=high\n",
    "        \n",
    "    def __iter__(self):\n",
    "        return self #함수의 정의상 self를 반환한다고 되어있엄. \n",
    "    def __next__(self):\n",
    "        if self.current>self.high:\n",
    "            raise StopIteration #발생시켜라\n",
    "        else:\n",
    "            res=self.current\n",
    "            self.current +=1\n",
    "            return res\n",
    "        \n",
    "        #UC San Diego교수의 코드..유튜브\n",
    "        "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 48,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "c=Counter(3,10)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 57,
   "metadata": {},
   "outputs": [
    {
     "ename": "StopIteration",
     "evalue": "",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mStopIteration\u001b[0m                             Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-57-73b012f9653f>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mnext\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mc\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;32m<ipython-input-47-3e3175007b31>\u001b[0m in \u001b[0;36m__next__\u001b[1;34m(self)\u001b[0m\n\u001b[0;32m      8\u001b[0m     \u001b[1;32mdef\u001b[0m \u001b[0m__next__\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mself\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      9\u001b[0m         \u001b[1;32mif\u001b[0m \u001b[0mself\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mcurrent\u001b[0m\u001b[1;33m>\u001b[0m\u001b[0mself\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mhigh\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m---> 10\u001b[1;33m             \u001b[1;32mraise\u001b[0m \u001b[0mStopIteration\u001b[0m \u001b[1;31m#발생시켜라\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m     11\u001b[0m         \u001b[1;32melse\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m     12\u001b[0m             \u001b[0mres\u001b[0m\u001b[1;33m=\u001b[0m\u001b[0mself\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mcurrent\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
      "\u001b[1;31mStopIteration\u001b[0m: "
     ]
    }
   ],
   "source": [
    "next(c)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 70,
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "Exception ignored in: <bound method FileReader.__del__ of <__main__.FileReader object at 0x05DEB330>>\n",
      "Traceback (most recent call last):\n",
      "  File \"<ipython-input-65-46605b6eed1f>\", line 6, in __del__\n",
      "AttributeError: 'FileReader' object has no attribute 'f'\n"
     ]
    }
   ],
   "source": [
    "class FileReader:\n",
    "    def __init__(self, filename):\n",
    "        self.f=open(filename)\n",
    "    \n",
    "    def __del__(self):\n",
    "        self.f.close()\n",
    "    def __iter__(self):\n",
    "        return self #역할은 없으나 에러나면 안되니까 파이썬에서 설계할때 넣어주라고 되어있음. \n",
    "    def __next__(self):\n",
    "        s=self.f.readline() #한줄씩 읽어라. 다 읽었으면 None임\n",
    "        if s:\n",
    "            return s\n",
    "        else:\n",
    "            raise StopIteration"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 71,
   "metadata": {},
   "outputs": [],
   "source": [
    "fr=FileReader('test.txt')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 72,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "<__main__.FileReader at 0x5deb750>"
      ]
     },
     "execution_count": 72,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "iter(fr)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 73,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "<__main__.FileReader at 0x5deb750>"
      ]
     },
     "execution_count": 73,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "fr"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 77,
   "metadata": {},
   "outputs": [
    {
     "ename": "StopIteration",
     "evalue": "",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mStopIteration\u001b[0m                             Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-77-269debdabfa0>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mnext\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mfr\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;32m<ipython-input-70-e2bbda5a9b46>\u001b[0m in \u001b[0;36m__next__\u001b[1;34m(self)\u001b[0m\n\u001b[0;32m     12\u001b[0m             \u001b[1;32mreturn\u001b[0m \u001b[0ms\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m     13\u001b[0m         \u001b[1;32melse\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m---> 14\u001b[1;33m             \u001b[1;32mraise\u001b[0m \u001b[0mStopIteration\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mStopIteration\u001b[0m: "
     ]
    }
   ],
   "source": [
    "next(fr)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": 94,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "#generator는 iterator의 일종이며,  \n",
    "#iterator(반복자)는 class이고  generator는 함수(또는 routine)다.\n",
    "#제너레이터의 사전적 의미는 \"발전기\" 또는 \"뭔가를 만드는 사람이나 물건\"을 뜻합니다. 위키피디아에는 \n",
    "# 컴퓨터 공학적 의미로써 다음과 같은 설명이 있네요. \"제너레이터는 반복자(iterator)와 같은 루프의 작용을 \n",
    "# 컨트롤하기 위해 쓰여지는 특별한 함수 또는 루틴이다. 사실 모든 제너레이터는 반복자이다. \n",
    "# 제너레이터는 배열이나 리스트를 리턴하는 함수와 비슷하며, 호출을 할 수 있는 파라메터를 가지고 있고, \n",
    "# 연속적인 값들을 만들어 낸다. 하지만 한번에 모든 값을 포함한 배열을 만들어서 리턴하는 대신에 \n",
    "# yield 구문을 이용해 한 번 호출될 때마다 하나의 값만을 리턴하고, 이런 이유로 일반 반복자에 비해 아주 \n",
    "# 작은 메모리를 필요로 한다. 간단히 얘기하면 제너레이터는 반복자와 같은 역할을 하는 함수이다.\"\n",
    "#generator는 iterator의 기능을 상속받아서 작동하는 것으로 짐작되지만 정확한것은 아님. \n",
    "#주로 실제코딩에서는 generator를 많이 쓰고 iterator는 class를 만들어야 하므로 잘 안씀.\n",
    "#iterator, generator는 lazy calculation(게으른 연산)하므로 좋음. \n",
    "li=[1,2,3,4,5,]\n",
    "def gen(li):\n",
    "    for e in li:\n",
    "        yield e #일드가 포인트임. yield는 값을 반환하고 홀딩(blocking)하고 있다가 \n",
    "        #next를 치면 작동하다가 StopIteration 나오면 종료됨\n",
    "        "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 79,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "g=gen(li)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 80,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "<generator object gen at 0x017C9690>"
      ]
     },
     "execution_count": 80,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "g"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 86,
   "metadata": {},
   "outputs": [
    {
     "ename": "StopIteration",
     "evalue": "",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mStopIteration\u001b[0m                             Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-86-5f315c5de15b>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mnext\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mg\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mStopIteration\u001b[0m: "
     ]
    }
   ],
   "source": [
    "next(g)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 87,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "def counter(low, high):\n",
    "    current=low\n",
    "    while True:\n",
    "        if current>high:\n",
    "            raise StopIteration\n",
    "        else:\n",
    "            yield current\n",
    "            current += 1"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 88,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "c=counter(2,5)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 93,
   "metadata": {},
   "outputs": [
    {
     "name": "stderr",
     "output_type": "stream",
     "text": [
      "c:\\users\\user\\appdata\\local\\programs\\python\\python36-32\\lib\\site-packages\\ipykernel_launcher.py:1: DeprecationWarning: generator 'counter' raised StopIteration\n",
      "  \"\"\"Entry point for launching an IPython kernel.\n"
     ]
    },
    {
     "ename": "StopIteration",
     "evalue": "",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mStopIteration\u001b[0m                             Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-93-73b012f9653f>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mnext\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mc\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;32m<ipython-input-87-8685ca38a86f>\u001b[0m in \u001b[0;36mcounter\u001b[1;34m(low, high)\u001b[0m\n\u001b[0;32m      3\u001b[0m     \u001b[1;32mwhile\u001b[0m \u001b[1;32mTrue\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      4\u001b[0m         \u001b[1;32mif\u001b[0m \u001b[0mcurrent\u001b[0m\u001b[1;33m>\u001b[0m\u001b[0mhigh\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 5\u001b[1;33m             \u001b[1;32mraise\u001b[0m \u001b[0mStopIteration\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m      6\u001b[0m         \u001b[1;32melse\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      7\u001b[0m             \u001b[1;32myield\u001b[0m \u001b[0mcurrent\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
      "\u001b[1;31mStopIteration\u001b[0m: "
     ]
    }
   ],
   "source": [
    "next(c)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 95,
   "metadata": {},
   "outputs": [
    {
     "ename": "NameError",
     "evalue": "name 'a' is not defined",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-95-482cfe585601>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[0;32m     11\u001b[0m \u001b[0mf\u001b[0m\u001b[1;33m=\u001b[0m\u001b[0mfibo\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;36m10\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m     12\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m---> 13\u001b[1;33m \u001b[1;32mfor\u001b[0m \u001b[0me\u001b[0m \u001b[1;32min\u001b[0m \u001b[0mf\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m     14\u001b[0m     \u001b[0mprint\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0me\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mend\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;34m' '\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m     15\u001b[0m \u001b[1;31m#1 1 2 3 5 이런 수열이 나와야함.\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
      "\u001b[1;32m<ipython-input-95-482cfe585601>\u001b[0m in \u001b[0;36mfibo\u001b[1;34m(n)\u001b[0m\n\u001b[0;32m      7\u001b[0m \u001b[1;32mdef\u001b[0m \u001b[0mfibo\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mn\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      8\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 9\u001b[1;33m     \u001b[1;32myield\u001b[0m \u001b[0ma\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m     10\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m     11\u001b[0m \u001b[0mf\u001b[0m\u001b[1;33m=\u001b[0m\u001b[0mfibo\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;36m10\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
      "\u001b[1;31mNameError\u001b[0m: name 'a' is not defined"
     ]
    }
   ],
   "source": [
    "#강의중 과제:\n",
    "#피보나치 수열: 재귀함수를 만들기위한 좋은 공부방법이됨. 지금은 generator로도 만들수 있으니 해볼것.\n",
    "##n=0 or n=1 =>1\n",
    "##n=2 =>2\n",
    "##n=3=>3\n",
    "##1 1 2 3 5 8 13 21 34 55 ...\n",
    "def fibo(n):\n",
    "    \n",
    "    yield a\n",
    "    \n",
    "f=fibo(10)\n",
    "\n",
    "for e in f:\n",
    "    print(e, end=' ')\n",
    "#1 1 2 3 5 이런 수열이 나와야함. "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 99,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "1 1 2 3 5 8 13 21 34 55 "
     ]
    }
   ],
   "source": [
    "def fibo(n):\n",
    "    a=1\n",
    "    b=1 #이 두줄 대신 a=b=1 라고 할수도. \n",
    "    for i in range(n):\n",
    "        yield a\n",
    "        a, b=b, a+b\n",
    "        \n",
    "f=fibo(10)\n",
    "for e in f:\n",
    "    print(e, end=' ')\n",
    "#1 1 2 3 5 이런 수열이 나와야함. "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 98,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "<generator object fibo at 0x01334240>"
      ]
     },
     "execution_count": 98,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "f"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 111,
   "metadata": {},
   "outputs": [],
   "source": [
    "#property : 생각보다 많이 쓰임. \n",
    "##객체에서 멤버에 접근하는 것 같지만 실제로는 메서드에 접근하는것을 property라고함. \n",
    "\n",
    "class Person:\n",
    "    def __init__(self, money):\n",
    "        #여기서 모든 인스턴스멤버를 초기화해줌\n",
    "        self.money=money\n",
    "    #인스턴스멤버에 접근하는 getter를 만들기    \n",
    "    @property #그냥 property로 하는게 getter임. \n",
    "    #access함수를 문법적으로 만들어놓은것이 getter, setter임. 따라서\n",
    "    ##@property라고 하는 순간 getter, setter가 되어버림. \n",
    "    def money(self):\n",
    "        print('getter')\n",
    "        \n",
    "        return self._m #내부에서만 쓰겠다는 의미로 __m, _m을 씀\n",
    "    \n",
    "    @money.setter\n",
    "    def money(self, money):\n",
    "        print('setter')\n",
    "        if money<0:\n",
    "            money =0\n",
    "        elif money > 10000:\n",
    "            money=10000\n",
    "            \n",
    "        self._m=money #이게 실제 내부에 있는 인스턴스멤버임."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 117,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "setter\n"
     ]
    }
   ],
   "source": [
    "p1=Person(-5000)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 121,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "setter\n"
     ]
    }
   ],
   "source": [
    "p1.money=5000"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 137,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "getter\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "5000"
      ]
     },
     "execution_count": 137,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "p1.money #멤버로 접근한것 같지만 실제론 함수로 접근한것임. "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 123,
   "metadata": {},
   "outputs": [
    {
     "ename": "NameError",
     "evalue": "name 'p2' is not defined",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-123-7118d22d9bcb>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mp2\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mmoney\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m: name 'p2' is not defined"
     ]
    }
   ],
   "source": [
    "p2.money"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 127,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "#위의 내용은 CSS_3rd/OOP/inheritance/iterator/property_exam.py로 코드 확인할것"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": 124,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "5000"
      ]
     },
     "execution_count": 124,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "p1._m"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 125,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "{'_m': 5000}"
      ]
     },
     "execution_count": 125,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "p1.__dict__"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 126,
   "metadata": {},
   "outputs": [
    {
     "ename": "NameError",
     "evalue": "name 'p2' is not defined",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-126-e1d2d25f4f07>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mp2\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0m_m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m: name 'p2' is not defined"
     ]
    }
   ],
   "source": [
    "p2._m"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 128,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "class Base:\n",
    "    #function overloading(함수 오버로딩)기법을 파이썬에서는 인정안함. 에러는 안나지만. \n",
    "    ##파이썬에서는 오버로딩이 안되고 , 맨 마지막에 써진것이 overwriting해버림. \n",
    "    def func():\n",
    "        print('first func')\n",
    "    def func():\n",
    "        print('second func')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 129,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "b=Base()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 130,
   "metadata": {},
   "outputs": [
    {
     "ename": "TypeError",
     "evalue": "func() takes 0 positional arguments but 1 was given",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-130-1840cac95e62>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mb\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mfunc\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mTypeError\u001b[0m: func() takes 0 positional arguments but 1 was given"
     ]
    }
   ],
   "source": [
    "b.func()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 134,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "class Base:\n",
    "    #function overloading(함수 오버로딩)기법을 파이썬에서는 인정안함. 에러는 안나지만. \n",
    "    ##파이썬에서는 함수오버로딩이 안되고 , 맨 마지막에 써진것이 overwriting해버림. \n",
    "    ##파이썬에서는 메서드 오버로딩은 됨. \n",
    "    def func(self, a):\n",
    "        print('first func')\n",
    "    def func(self, a,b):\n",
    "        print('second func')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 135,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "b=Base()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 136,
   "metadata": {},
   "outputs": [
    {
     "ename": "TypeError",
     "evalue": "unsupported operand type(s) for +: 'int' and 'Base'",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-136-b82d26c8b53e>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[0ma\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;36m10\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      2\u001b[0m \u001b[0mc\u001b[0m\u001b[1;33m=\u001b[0m\u001b[1;36m12\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 3\u001b[1;33m \u001b[0md\u001b[0m\u001b[1;33m=\u001b[0m\u001b[0ma\u001b[0m\u001b[1;33m+\u001b[0m\u001b[0mb\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mTypeError\u001b[0m: unsupported operand type(s) for +: 'int' and 'Base'"
     ]
    }
   ],
   "source": [
    "# a=10\n",
    "# c=12\n",
    "# d=a+b"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 138,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "setter\n"
     ]
    }
   ],
   "source": [
    "p1=Person(-1000)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 139,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "getter\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "0"
      ]
     },
     "execution_count": 139,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "p1.money"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 147,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "#여기까지는 파이썬의 특징인 decorator, iterator, property를 강의했음. 이제부터 상속에대해 강의예정. \n",
    "##coroutine은 강의에서 뺐으나 공부할려면 할것.\n",
    "##OOP가 강력한 이유는 inheritance(상속)를 이용한 다형성(polymorphism)때문임. \n",
    "#아래와 같이 코딩 할수도 있으나 잊어버려도됨. \n",
    "class Base:\n",
    "    def get(self):\n",
    "        print('getter')\n",
    "        return self._m\n",
    "    def set(self, money):\n",
    "        print('setter')\n",
    "        self._m=money\n",
    "    \n",
    "    money= property(get, set)\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 148,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "b=Base()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 149,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "getter\n"
     ]
    },
    {
     "ename": "AttributeError",
     "evalue": "'Base' object has no attribute '_m'",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mAttributeError\u001b[0m                            Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-149-4a2d8a66e629>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mb\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mmoney\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;32m<ipython-input-147-01d58dbea957>\u001b[0m in \u001b[0;36mget\u001b[1;34m(self)\u001b[0m\n\u001b[0;32m      6\u001b[0m     \u001b[1;32mdef\u001b[0m \u001b[0mget\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mself\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      7\u001b[0m         \u001b[0mprint\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m'getter'\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 8\u001b[1;33m         \u001b[1;32mreturn\u001b[0m \u001b[0mself\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0m_m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m      9\u001b[0m     \u001b[1;32mdef\u001b[0m \u001b[0mset\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mself\u001b[0m\u001b[1;33m,\u001b[0m \u001b[0mmoney\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m     10\u001b[0m         \u001b[0mprint\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m'setter'\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
      "\u001b[1;31mAttributeError\u001b[0m: 'Base' object has no attribute '_m'"
     ]
    }
   ],
   "source": [
    "b.money"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 152,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "#operator overloading(연산자 오버로딩): function overloading과는 전혀 다른개념임.\n",
    "#Point란 (x,y)좌표를 의미\n",
    "class Point:\n",
    "    def __init__(self, x=0,y=0):\n",
    "        self.x=x\n",
    "        self.y=y\n",
    "    def get_point(self):\n",
    "        return self.x, self.y\n",
    "    \n",
    "    def set_point(self, x,y):\n",
    "        self.x=x\n",
    "        self.y=y\n",
    "        \n",
    "    def __str__(self):\n",
    "        return '({},{})'.format(self.x, self.y)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 153,
   "metadata": {},
   "outputs": [],
   "source": [
    "p1=Point()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 154,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "p1.set_point(3,3)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 155,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "(3,3)\n"
     ]
    }
   ],
   "source": [
    "print(p1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 158,
   "metadata": {},
   "outputs": [
    {
     "ename": "TypeError",
     "evalue": "unsupported operand type(s) for +: 'Point' and 'int'",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-158-dfb672c5c122>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mp2\u001b[0m\u001b[1;33m=\u001b[0m\u001b[0mp1\u001b[0m\u001b[1;33m+\u001b[0m\u001b[1;36m5\u001b[0m \u001b[1;31m#에러나는데 이걸 되게 만드는것이 연산자오버로딩.\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mTypeError\u001b[0m: unsupported operand type(s) for +: 'Point' and 'int'"
     ]
    }
   ],
   "source": [
    "p2=p1+5 #이건 에러나는데 이걸 되게 만드는것이 연산자오버로딩.\n",
    "#즉, 서로 형식이 달라서 연산이 안되는데 이걸써서 \n",
    "#일반적으로 알고 있는 연산자가 실행되도록 만드는것.\n",
    "#파이썬에 어떤식으로 연산자오버로딩할수있는지가 내장되어 있음. "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 160,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "class Point:\n",
    "    def __init__(self, x=0,y=0):\n",
    "        self.x=x\n",
    "        self.y=y\n",
    "    def get_point(self):\n",
    "        return self.x, self.y\n",
    "    \n",
    "    def set_point(self, x,y):\n",
    "        self.x=x\n",
    "        self.y=y\n",
    "     #operator overloading위해 아래 4줄을 추가할것   \n",
    "    def __add__(self, other):\n",
    "        _x=self.x+other\n",
    "        _y=self.y+other\n",
    "        return Point(_x,_y)\n",
    "    def __str__(self):\n",
    "        return '({},{})'.format(self.x, self.y)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 161,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "p1=Point()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 162,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "(0,0)\n"
     ]
    }
   ],
   "source": [
    "print(p1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 163,
   "metadata": {},
   "outputs": [
    {
     "ename": "NameError",
     "evalue": "name 'p2' is not defined",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-163-a4d18f4be1e3>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mprint\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mp2\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m: name 'p2' is not defined"
     ]
    }
   ],
   "source": [
    "print(p2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 164,
   "metadata": {},
   "outputs": [
    {
     "ename": "TypeError",
     "evalue": "unsupported operand type(s) for +: 'int' and 'Point'",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-164-bf5013001fe1>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mp3\u001b[0m\u001b[1;33m=\u001b[0m \u001b[1;36m5\u001b[0m\u001b[1;33m+\u001b[0m\u001b[0mp1\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mTypeError\u001b[0m: unsupported operand type(s) for +: 'int' and 'Point'"
     ]
    }
   ],
   "source": [
    "p3= 5+p1 #이건 안되는게 일단 맞음. 왜냐하면 p1.__add>>(5)를 \n",
    "#호출한것일뿐이므로.\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 165,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "class Point:\n",
    "    def __init__(self, x=0,y=0):\n",
    "        self.x=x\n",
    "        self.y=y\n",
    "    def get_point(self):\n",
    "        return self.x, self.y\n",
    "    \n",
    "    def set_point(self, x,y):\n",
    "        self.x=x\n",
    "        self.y=y\n",
    "     #operator overloading위해 아래 4줄을 추가할것   \n",
    "    def __add__(self, other):\n",
    "        _x=self.x+other\n",
    "        _y=self.y+other\n",
    "        return Point(_x,_y)\n",
    "    \n",
    "    def __radd__(self, other): #reverse: 뒤에서 부터 거꾸로\n",
    "        return self.__add__(other)\n",
    "    def __sub__(self, other):\n",
    "        pass\n",
    "    def __rsub__(self, other):\n",
    "        pass\n",
    "    \n",
    "    def __str__(self):\n",
    "        return '({},{})'.format(self.x, self.y)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 166,
   "metadata": {},
   "outputs": [
    {
     "ename": "NameError",
     "evalue": "name 'p3' is not defined",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-166-cf1730dab73e>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[0;32m      1\u001b[0m \u001b[1;31m#과제 (4,4)\u001b[0m\u001b[1;33m\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[1;32m----> 2\u001b[1;33m \u001b[0mp4\u001b[0m\u001b[1;33m=\u001b[0m\u001b[0mp3\u001b[0m \u001b[1;33m+\u001b[0m \u001b[1;36m4\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m: name 'p3' is not defined"
     ]
    }
   ],
   "source": [
    "#과제 (4,4) \n",
    "p4=p3 + 4\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 167,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "class Point:\n",
    "    def __init__(self, x=0,y=0):\n",
    "        self.x=x\n",
    "        self.y=y\n",
    "    def get_point(self):\n",
    "        return self.x, self.y\n",
    "    \n",
    "    def set_point(self, x,y):\n",
    "        self.x=x\n",
    "        self.y=y\n",
    "     #operator overloading위해 아래 4줄을 추가할것   \n",
    "    def __add__(self, other):\n",
    "        _x=self.x+other\n",
    "        _y=self.y+other\n",
    "        return Point(_x,_y)\n",
    "    \n",
    "    def __radd__(self, other): #reverse: 뒤에서 부터 거꾸로\n",
    "        return self.__add__(other)\n",
    "        \n",
    "    def __sub__(self, other):\n",
    "        pass\n",
    "    def __rsub__(self, other):\n",
    "        pass\n",
    "    \n",
    "    def __str__(self):\n",
    "        return '({},{})'.format(self.x, self.y)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 180,
   "metadata": {},
   "outputs": [
    {
     "ename": "SyntaxError",
     "evalue": "unexpected EOF while parsing (<ipython-input-180-f234bbb57a76>, line 26)",
     "output_type": "error",
     "traceback": [
      "\u001b[1;36m  File \u001b[1;32m\"<ipython-input-180-f234bbb57a76>\"\u001b[1;36m, line \u001b[1;32m26\u001b[0m\n\u001b[1;33m    print('move to {}'.format(where)\u001b[0m\n\u001b[1;37m                                    ^\u001b[0m\n\u001b[1;31mSyntaxError\u001b[0m\u001b[1;31m:\u001b[0m unexpected EOF while parsing\n"
     ]
    }
   ],
   "source": [
    "#상속과 합성을 언제 쓸것인지가 중요.\n",
    "#is-a 관계일때는 상속을 써라.\n",
    "#A laptop IS A computer.\n",
    "#~이 ~의 일종이다.\n",
    "class Computer:\n",
    "    def __init__(self, cpu, ram):\n",
    "        #인스턴스 멤버가 2개\n",
    "        self.CPU=cpu\n",
    "        self.RAM=ram\n",
    "    def browse(self):\n",
    "        print('browse')\n",
    "    def work(self):\n",
    "        print('work')\n",
    "        \n",
    "#기본클래스=부모클래스, 파생클래스=자식클래스\n",
    "#Base class의 모든 멤버와 모든 메서드를 받는다.\n",
    "#reusability가 높아짐. 즉 코드 재사용성이 높아짐. \n",
    "class Laptor(Computer):\n",
    "    pass\n",
    "    #추가적인 멤버 혹은 추가적인 메서드만 정의 \n",
    "    def __init__(self, cpu, ram, battery):\n",
    "        super().__init__(cpu, ram)\n",
    "        self.battery=battery\n",
    "        \n",
    "    def move(self):\n",
    "        print('move to {}'.format(where)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 178,
   "metadata": {},
   "outputs": [
    {
     "ename": "NameError",
     "evalue": "name 'Laptop' is not defined",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-178-781d858f49e9>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0ml1\u001b[0m\u001b[1;33m=\u001b[0m\u001b[0mLaptop\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m'intel'\u001b[0m\u001b[1;33m,\u001b[0m \u001b[1;36m16\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m: name 'Laptop' is not defined"
     ]
    }
   ],
   "source": [
    "l1=Laptop('intel', 16)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 197,
   "metadata": {},
   "outputs": [
    {
     "ename": "NameError",
     "evalue": "name 'l1' is not defined",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-197-361c2ea75467>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0ml1\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mCPU\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m: name 'l1' is not defined"
     ]
    }
   ],
   "source": [
    "l1.CPU"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 198,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "#'A policeman HAS-A gun.'\n",
    "#~이 ~을 가지고 있다. 또는 ~이 ~을 포함하고 있다. \n",
    "#이럴때는 상속말고 composition(합성) or aggregation(통합)을 써야.\n",
    "#composition: 차가 생성되었을 엔진생겼다가 폐차될때 같이 \n",
    "#사라지는 것. 즉 같이 죽는것. 즉 바인딩이 강한것을 composition이라하고\n",
    "#객체가 생겼다가 사라지는 시점이 약한것을 aggregation이라함. \n",
    "\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 211,
   "metadata": {},
   "outputs": [
    {
     "ename": "IndentationError",
     "evalue": "expected an indented block (<ipython-input-211-18b13dc21451>, line 13)",
     "output_type": "error",
     "traceback": [
      "\u001b[1;36m  File \u001b[1;32m\"<ipython-input-211-18b13dc21451>\"\u001b[1;36m, line \u001b[1;32m13\u001b[0m\n\u001b[1;33m    def get_gun(self, gun):\u001b[0m\n\u001b[1;37m    ^\u001b[0m\n\u001b[1;31mIndentationError\u001b[0m\u001b[1;31m:\u001b[0m expected an indented block\n"
     ]
    }
   ],
   "source": [
    "class Gun:\n",
    "    def __init__(self, gun_kind):\n",
    "        self.gun_kind= gun_kind\n",
    "    def bang(self):\n",
    "        print('bang bang')\n",
    "class Police: #이때는 경찰이 일종의 건은 아니므로\n",
    "    def __init__(self, gun_kind= ''):\n",
    "        if not gun_kind:\n",
    "            self.gun=None #총없는 경찰을 표현\n",
    "        else:\n",
    "            #멤버가 건클래스의 인스턴스 즉 객체를 가지게 만든다. \n",
    "            #이것을 composition or aggregation이라고함. \n",
    "    def get_gun(self, gun):\n",
    "        self.gun=gun\n",
    "        \n",
    "    def shoot(self):\n",
    "        if not self.gun:\n",
    "            return \n",
    "        \n",
    "        self.gun.bang()\n",
    "            "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 204,
   "metadata": {},
   "outputs": [
    {
     "ename": "AttributeError",
     "evalue": "'Point' object has no attribute 'shoot'",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mAttributeError\u001b[0m                            Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-204-db6fc181fdab>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mp1\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mshoot\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mAttributeError\u001b[0m: 'Point' object has no attribute 'shoot'"
     ]
    }
   ],
   "source": [
    "p1.shoot()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 205,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "p2=Police()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 206,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "gun=Gun('기관총')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 207,
   "metadata": {},
   "outputs": [
    {
     "ename": "AttributeError",
     "evalue": "'Police' object has no attribute 'get_gun'",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mAttributeError\u001b[0m                            Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-207-c8258382393a>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mp2\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mget_gun\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mgun\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mAttributeError\u001b[0m: 'Police' object has no attribute 'get_gun'"
     ]
    }
   ],
   "source": [
    "p2.get_gun(gun)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 208,
   "metadata": {},
   "outputs": [
    {
     "ename": "AttributeError",
     "evalue": "'Police' object has no attribute 'shoot'",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mAttributeError\u001b[0m                            Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-208-c7c0927b3dcd>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mp2\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mshoot\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mAttributeError\u001b[0m: 'Police' object has no attribute 'shoot'"
     ]
    }
   ],
   "source": [
    "p2.shoot()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": 218,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "\n",
    "#abstract class: 추상 클래스\n",
    "##instance를 만들수 없음. \n",
    "##최소한 하나 이상의 abstract method( pure virtual function(순수 가상 함수)를 가져야함. )\n",
    "##추상클래스는 함수의 몸체가 없음. 즉 정의되어 있지 않고 \n",
    "###반드시 자식, 파생 클래스에서 재정의 (method overriding)해야함. \n",
    "####어떤 object를  invoke하느냐에 따라 결과가 결정됨.\n",
    "from abc  import * #abstract base class\n",
    "class Animal(metaclass= ABCMeta):\n",
    "    @abstractmethod\n",
    "    def say(self):\n",
    "        pass #pass는 몸체가 없다는뜻\n",
    "    \n",
    "class Dog(Animal):\n",
    "    def say(self): #say도 상속받을텐데 기능 안하고 Animal을 덮어버리므로 \n",
    "        #즉, 부모에 있는 같은 이름의 클래스를 덮어버림\n",
    "        #따라서 부모클래스도 재정의 해야함. \n",
    "        #say를 실수로 빼먹는 것을 미연에 방지해주는것이\n",
    "        ##추상클래스임.\n",
    "        print('멍멍')\n",
    "class Cat(Animal):\n",
    "    def say(self):\n",
    "        print('야옹 야옹')\n",
    "class Duck(Animal):\n",
    "    def say(self):\n",
    "        print('꽥꽥')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 219,
   "metadata": {},
   "outputs": [
    {
     "ename": "TypeError",
     "evalue": "Can't instantiate abstract class Animal with abstract methods say",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-219-b760e03c3d7b>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0ma\u001b[0m\u001b[1;33m=\u001b[0m\u001b[0mAnimal\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m \u001b[1;31m#인스턴스를 만들수 없다는 에러날것임.\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mTypeError\u001b[0m: Can't instantiate abstract class Animal with abstract methods say"
     ]
    }
   ],
   "source": [
    "a=Animal() #인스턴스를 만들수 없다는 에러날것임. "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 217,
   "metadata": {},
   "outputs": [
    {
     "ename": "TypeError",
     "evalue": "Can't instantiate abstract class Dog with abstract methods say",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-217-35e61fbc947f>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0md\u001b[0m\u001b[1;33m=\u001b[0m\u001b[0mDog\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mTypeError\u001b[0m: Can't instantiate abstract class Dog with abstract methods say"
     ]
    }
   ],
   "source": [
    "d=Dog()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 220,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "d= Dog()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 221,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "멍멍\n"
     ]
    }
   ],
   "source": [
    "d.say()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 225,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "#다형성(polymorphism)\n",
    "#같은 코드인데 다른 결과가 나온다는뜻.\n",
    "#즉 같은 이름의 메서드를 invoke(호출)하지만 \n",
    "#결과는 어떤 종류의 객체를 invoke하느냐에 따라 다르다는뜻\n",
    "##(즉 객체중에서도 어떤 종류의 객체를 호출했느냐에 따라 결과다름)\n",
    "#OOP의 꽃임. \n",
    "animals=[]\n",
    "animals.append(Dog())\n",
    "animals.append(Cat())\n",
    "animals.append(Duck())"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 226,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "멍멍\n",
      "야옹 야옹\n",
      "꽥꽥\n"
     ]
    }
   ],
   "source": [
    "for animal in animals:\n",
    "    animal.say()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 228,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "from abc import *\n",
    "#클래스 설계시 중요한것은 공통적인 부분을 상위클래스에 다 담는것.\n",
    "##멤버, 메서드\n",
    "class Character(metaclass=ABCMeta):\n",
    "    def __init__(self, name, hp, power): #게임에서 이세개는 꼭 필요.\n",
    "        self.name=name\n",
    "        self.HP=h\n",
    "        self.power=power\n",
    "    @abstractmethod    \n",
    "    def attack(self, other):\n",
    "        pass\n",
    "    @abstractmethod\n",
    "\n",
    "    def get_damage(self, power):\n",
    "        pass\n",
    "    \n",
    "    def __str__(self):\n",
    "        return '{}:{}'\n",
    "   #이상은 캐릭터를 만든것임.  "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 229,
   "metadata": {},
   "outputs": [
    {
     "ename": "SyntaxError",
     "evalue": "invalid syntax (<ipython-input-229-465f041c8b5a>, line 3)",
     "output_type": "error",
     "traceback": [
      "\u001b[1;36m  File \u001b[1;32m\"<ipython-input-229-465f041c8b5a>\"\u001b[1;36m, line \u001b[1;32m3\u001b[0m\n\u001b[1;33m    def __init__(self, name= 'player', hp=100, power=20, *attack_kinds) #가변인자\u001b[0m\n\u001b[1;37m                                                                             ^\u001b[0m\n\u001b[1;31mSyntaxError\u001b[0m\u001b[1;31m:\u001b[0m invalid syntax\n"
     ]
    }
   ],
   "source": [
    "#얼음, 불 같은것 끼리 공격하면 힘세지고 반대것 끼리 공격하면 힘 약해짐. \n",
    "class Player(Character):\n",
    "    def __init__(self, name= 'player', hp=100, power=20, *attack_kinds) #가변인자\n",
    "        super().__init__(name, hp, power)\n",
    "        self. skills=[]\n",
    "        for attack_kind in attack_kinds:\n",
    "            self.skills.append(attack_kind)\n",
    "    #message passing\n",
    "    def attack(self, other, attack_kind):\n",
    "        if attack_kind in self.skills:\n",
    "            other.get_damage(self.power, attack_kind)\n",
    "    def get_damage(self, power):\n",
    "        '''\n",
    "        만약에 스킬에 공격 당하는 kind있으면 power의 반만 깍이고\n",
    "        없으면 power만큼 깍인다.\n",
    "        '''\n",
    "        if attack_kind in self.skills:\n",
    "            self.HP -=(power//2)\n",
    "        else:\n",
    "            self.HP -=power\n",
    "class Monster(Character):\n",
    "    def __init__(self, name, hp, power, attack_kind):\n",
    "        super().__init__(name, hp, power)\n",
    "        self.attack_kind=None #None으로라도 설정안하면 에러남\n",
    "        \n",
    "    def attack(self, other, attack_kind):\n",
    "        if self.attack_kind==attack_kind:\n",
    "            other.get_damage(self.power,attack_kind)\n",
    "    def get_damage(self, power, attack_kind):\n",
    "        if self.attack_kind==attack_kind:\n",
    "            self.HP+=power\n",
    "        else:\n",
    "            self.HP-=power\n",
    "            \n",
    "class IceMonster:\n",
    "    def __init__(self, name='ICE MONSTER', hp=100, power=20, attack_kind):\n",
    "        super().__init__(name, hp, power)\n",
    "        self.attack_kind='ICE'\n",
    "        \n",
    "class FireMonster:\n",
    "    def __init__(self, name='FireMonster', hp=10, power=30, attack_kind):\n",
    "        super().__init__(name, hp, power)\n",
    "        self.attack_kind='FIRE'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 230,
   "metadata": {},
   "outputs": [
    {
     "ename": "NameError",
     "evalue": "name 'Player' is not defined",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-230-cee99602e7af>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mplayer\u001b[0m\u001b[1;33m=\u001b[0m\u001b[0mPlayer\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;34m'great'\u001b[0m\u001b[1;33m,\u001b[0m \u001b[1;36m120\u001b[0m\u001b[1;33m,\u001b[0m \u001b[1;36m30\u001b[0m\u001b[1;33m,\u001b[0m \u001b[1;34m'ICE'\u001b[0m\u001b[1;33m,\u001b[0m \u001b[1;34m'FIRE'\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m: name 'Player' is not defined"
     ]
    }
   ],
   "source": [
    "player=Player('great', 120, 30, 'ICE', 'FIRE')\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 231,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "monster=[]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 232,
   "metadata": {},
   "outputs": [
    {
     "ename": "NameError",
     "evalue": "name 'monsters' is not defined",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-232-0520eec7af0a>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[0mmonsters\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mappend\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mIceMonster\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m      2\u001b[0m \u001b[0mmonsters\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mappend\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mFireMonster\u001b[0m\u001b[1;33m(\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
      "\u001b[1;31mNameError\u001b[0m: name 'monsters' is not defined"
     ]
    }
   ],
   "source": [
    "monsters.append(IceMonster())\n",
    "monsters.append(FireMonster())"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 233,
   "metadata": {},
   "outputs": [
    {
     "ename": "NameError",
     "evalue": "name 'monsters' is not defined",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-233-cd4b06583bee>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[1;32mfor\u001b[0m \u001b[0mmonster\u001b[0m \u001b[1;32min\u001b[0m \u001b[0mmonsters\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m      2\u001b[0m     \u001b[0mprint\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mmonster\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0;32m      3\u001b[0m \u001b[1;33m\u001b[0m\u001b[0m\n",
      "\u001b[1;31mNameError\u001b[0m: name 'monsters' is not defined"
     ]
    }
   ],
   "source": [
    "for monster in monsters:\n",
    "    print(monster)\n",
    "    "
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 234,
   "metadata": {},
   "outputs": [
    {
     "ename": "NameError",
     "evalue": "name 'monsters' is not defined",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-234-fb6d6234104a>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[1;32mfor\u001b[0m \u001b[0mmonster\u001b[0m \u001b[1;32min\u001b[0m \u001b[0mmonsters\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m      2\u001b[0m     \u001b[0mplayer\u001b[0m\u001b[1;33m.\u001b[0m\u001b[0mattack\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mmonster\u001b[0m\u001b[1;33m,\u001b[0m \u001b[1;34m'ICE'\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
      "\u001b[1;31mNameError\u001b[0m: name 'monsters' is not defined"
     ]
    }
   ],
   "source": [
    "for monster in monsters:\n",
    "    player.attack(monster, 'ICE')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 235,
   "metadata": {},
   "outputs": [
    {
     "ename": "NameError",
     "evalue": "name 'monsters' is not defined",
     "output_type": "error",
     "traceback": [
      "\u001b[1;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[1;31mNameError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[1;32m<ipython-input-235-e060027c8b1c>\u001b[0m in \u001b[0;36m<module>\u001b[1;34m()\u001b[0m\n\u001b[1;32m----> 1\u001b[1;33m \u001b[1;32mfor\u001b[0m \u001b[0mmonster\u001b[0m \u001b[1;32min\u001b[0m \u001b[0mmonsters\u001b[0m\u001b[1;33m:\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n\u001b[0m\u001b[0;32m      2\u001b[0m     \u001b[0mprint\u001b[0m\u001b[1;33m(\u001b[0m\u001b[0mmonster\u001b[0m\u001b[1;33m)\u001b[0m\u001b[1;33m\u001b[0m\u001b[0m\n",
      "\u001b[1;31mNameError\u001b[0m: name 'monsters' is not defined"
     ]
    }
   ],
   "source": [
    "for monster in monsters:\n",
    "    print(monster)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  }
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