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   "source": [
    "# static method - @classmethod, @staticmethod"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Python에서는 static(정적) 메소드를 데코레이터로 정의 할 수 있음\n",
    "\n",
    "@staticmethod, @classmethod를 사용한다.\n",
    "\n",
    "이 둘의 차이점은 classmethod의 경우는 첫번째 인수가 클래스를 지정하는데 반해 staticmethod는 인수를 받지 않음!!!\n",
    "\n",
    "따라서 상속받는 경우 동작이 다름\n",
    "\n",
    "\n",
    "[참고 자료](http://blog.naver.com/parkjy76/30167615254)"
   ]
  },
  {
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   "source": [
    "class foo(object):\n",
    "    name = 'foo'\n",
    "\n",
    "    @staticmethod\n",
    "    def get_name_static():\n",
    "        print(foo.name)\n",
    "\n",
    "    @classmethod\n",
    "    def get_name_class(cls):\n",
    "        print(cls.name)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {
    "ExecuteTime": {
     "end_time": "2017-09-24T02:14:53.912627Z",
     "start_time": "2017-09-24T02:14:53.909729Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "foo\n"
     ]
    }
   ],
   "source": [
    "foo.get_name_static()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "ExecuteTime": {
     "end_time": "2017-09-24T02:15:05.611764Z",
     "start_time": "2017-09-24T02:15:05.608498Z"
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   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "foo\n"
     ]
    }
   ],
   "source": [
    "foo.get_name_class()"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "#### 여기선 둘 다 동일"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {
    "ExecuteTime": {
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     "start_time": "2017-09-24T02:16:25.462492Z"
    },
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "class bar(foo):\n",
    "    name = 'bar'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {
    "ExecuteTime": {
     "end_time": "2017-09-24T02:16:26.714550Z",
     "start_time": "2017-09-24T02:16:26.711367Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "foo\n"
     ]
    }
   ],
   "source": [
    "bar.get_name_static()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {
    "ExecuteTime": {
     "end_time": "2017-09-24T02:16:45.421706Z",
     "start_time": "2017-09-24T02:16:45.418328Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "bar\n"
     ]
    }
   ],
   "source": [
    "bar.get_name_class()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {
    "ExecuteTime": {
     "end_time": "2017-09-24T02:20:45.729059Z",
     "start_time": "2017-09-24T02:20:45.724170Z"
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    "collapsed": true
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   "outputs": [],
   "source": [
    "class foo(object):\n",
    "    @classmethod\n",
    "    def set_name(cls, name):\n",
    "        cls.name = name\n",
    "\n",
    "class bar(foo):\n",
    "    pass"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {
    "ExecuteTime": {
     "end_time": "2017-09-24T02:21:05.630740Z",
     "start_time": "2017-09-24T02:21:05.624831Z"
    }
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "foo\n",
      "foo\n",
      "foo\n",
      "bar\n"
     ]
    }
   ],
   "source": [
    "foo.set_name(\"foo\")\n",
    "print(foo.name)\n",
    "print(bar.name)\n",
    "\n",
    "bar.set_name(\"bar\")\n",
    "print(foo.name)\n",
    "print(bar.name)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {
    "ExecuteTime": {
     "end_time": "2017-09-24T02:21:49.133794Z",
     "start_time": "2017-09-24T02:21:49.129108Z"
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   "outputs": [],
   "source": [
    "class foo(object):\n",
    "    @staticmethod\n",
    "    def set_name(name):\n",
    "        foo.name = name\n",
    "\n",
    "class bar(foo):\n",
    "    pass"
   ]
  },
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   "cell_type": "code",
   "execution_count": 11,
   "metadata": {
    "ExecuteTime": {
     "end_time": "2017-09-24T02:22:04.379206Z",
     "start_time": "2017-09-24T02:22:04.372761Z"
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   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "foo\n",
      "foo\n",
      "bar\n",
      "bar\n"
     ]
    }
   ],
   "source": [
    "foo.set_name(\"foo\")\n",
    "print(foo.name)\n",
    "print(bar.name)\n",
    "\n",
    "bar.set_name(\"bar\")\n",
    "print(foo.name)\n",
    "print(bar.name)"
   ]
  },
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   "execution_count": null,
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    "collapsed": true
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