{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "portuguese-emerald",
   "metadata": {},
   "source": [
    "# **Python Decorator**\n",
    "## **1 가변적 입력값에 가공처리가 필요시 활용**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "pediatric-letter",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "get_max(args=(10, 20, 30), kwargs={}) => 30\n",
      "get_min(args=(), kwargs={'x': 10, 'y': 20, 'z': 30}) => 10\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "10"
      ]
     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "def traced(function):\n",
    "    def wrapper(*args, **kwargs):\n",
    "        response = function(*args, **kwargs)\n",
    "        print(f\"{function.__name__}(args={args}, kwargs={kwargs}) => {response}\")\n",
    "        return response\n",
    "    return wrapper\n",
    "\n",
    "@traced\n",
    "def get_max(*args):\n",
    "    return max(args)\n",
    "\n",
    "@traced\n",
    "def get_min(**kwargs):\n",
    "    return min(kwargs.values())   # Value 값을 출력\n",
    "    # return min(kwargs)          # Key 값을 출력\n",
    "\n",
    "\n",
    "get_max(10, 20, 30)\n",
    "get_min(x=10, y=20, z=30)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "intimate-comparison",
   "metadata": {},
   "source": [
    "## **2 매개변수가 있는 데코레이터**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "intermediate-anger",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "add_number 의 반환값은 2의 배수 아닙니다.\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "5"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "def is_multiple(x):\n",
    "    def real_decorator(function):   # 데코레이터 역활 함수\n",
    "        def wrapper(*args, **kwargs):  # Wrapper 함수\n",
    "            response = function(*args, **kwargs)\n",
    "            return_text = f\"{function.__name__} 의 반환값은 {x}의 배수\"\n",
    "            if response % x == 0:\n",
    "                print(return_text + \" 입니다.\")\n",
    "            else:\n",
    "                print(return_text + \" 아닙니다.\")\n",
    "            return response\n",
    "        return wrapper\n",
    "    return real_decorator\n",
    "\n",
    "\n",
    "@is_multiple(2)\n",
    "def add_number(a, b):\n",
    "    return a + b\n",
    "\n",
    "add_number(1,4)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "narrative-project",
   "metadata": {},
   "source": [
    "## **3 Class 로 데코레이터 만들기**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "convinced-delaware",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "hello_world 함수 시작\n",
      "hello\n",
      "hello_world 함수 종료\n"
     ]
    }
   ],
   "source": [
    "class Trace:\n",
    "    def __init__(self, function):\n",
    "        self.function = function\n",
    "        \n",
    "    def __call__(self):\n",
    "        text_string = f\"{self.function.__name__}\"\n",
    "        print(text_string + \" 함수 시작\")\n",
    "        self.function()\n",
    "        print(text_string + \" 함수 종료\")\n",
    "\n",
    "@Trace\n",
    "def hello_world():\n",
    "    print('hello')\n",
    "    \n",
    "hello_world()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "russian-fourth",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "hello_world 함수 시작\n",
      "hello\n",
      "hello_world 함수 종료\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "<__main__.Trace at 0x7fcd10d874f0>"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# Decorator 를 사용하지 않고서도 동일한 결과값 출력\n",
    "Trace(hello_world())"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "automotive-activity",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "add_number (args=(10, 20), kwargs={}) => 30\n",
      "add_number (args=(), kwargs={'a': 10, 'b': 20}) => 30\n"
     ]
    },
    {
     "data": {
      "text/plain": [
       "30"
      ]
     },
     "execution_count": 5,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# 매개변수를 활용하는 Class 데코레이터\n",
    "class Trace:\n",
    "    def __init__(self, function):\n",
    "        self.function = function\n",
    "        \n",
    "    def __call__(self, *args, **kwargs):\n",
    "        response = self.function(*args, **kwargs)\n",
    "        text_string = f\"{self.function.__name__} (args={args}, kwargs={kwargs}) => {response}\"\n",
    "        print(text_string)\n",
    "        return response\n",
    "\n",
    "@Trace\n",
    "def add_number(a, b):\n",
    "    return a + b\n",
    "    \n",
    "add_number(10, 20)\n",
    "add_number(a=10, b=20)"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "ready-empire",
   "metadata": {},
   "source": [
    "## **3-2 Class 로 매개변수와 반환값 처리 데코레이터 만들기**"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "id": "hazardous-baseball",
   "metadata": {},
   "outputs": [],
   "source": [
    "class IsMultiple:\n",
    "    def __init__(self, x):\n",
    "        self.x = x\n",
    "        \n",
    "    def __call__(self, function):\n",
    "        def wrapper(a, b):\n",
    "            response = function(a, b)\n",
    "            text = f\"{function.__name__} 의 반환값은 {self.x}의 배수\"\n",
    "            if response % self.x == 0:\n",
    "                print(text + \" 입니다\")\n",
    "            else:\n",
    "                print(text + \"가 아닙니다\")\n",
    "            return response\n",
    "        return wrapper"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "id": "concrete-powder",
   "metadata": {},
   "outputs": [
    {
     "ename": "TypeError",
     "evalue": "__init__() missing 1 required positional argument: 'function'",
     "output_type": "error",
     "traceback": [
      "\u001b[0;31m---------------------------------------------------------------------------\u001b[0m",
      "\u001b[0;31mTypeError\u001b[0m                                 Traceback (most recent call last)",
      "\u001b[0;32m<ipython-input-13-f50c1b44867f>\u001b[0m in \u001b[0;36m<module>\u001b[0;34m\u001b[0m\n\u001b[0;32m----> 1\u001b[0;31m \u001b[0;34m@\u001b[0m\u001b[0mIsMultiple\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;36m3\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      2\u001b[0m \u001b[0;32mdef\u001b[0m \u001b[0madd\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0ma\u001b[0m\u001b[0;34m,\u001b[0m \u001b[0mb\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[1;32m      3\u001b[0m     \u001b[0;32mreturn\u001b[0m \u001b[0ma\u001b[0m \u001b[0;34m+\u001b[0m \u001b[0mb\u001b[0m\u001b[0;34m\u001b[0m\u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      4\u001b[0m \u001b[0;34m\u001b[0m\u001b[0m\n\u001b[1;32m      5\u001b[0m \u001b[0madd\u001b[0m\u001b[0;34m(\u001b[0m\u001b[0;36m10\u001b[0m\u001b[0;34m,\u001b[0m\u001b[0;36m10\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: __init__() missing 1 required positional argument: 'function'"
     ]
    }
   ],
   "source": [
    "@IsMultiple(3)\n",
    "def add(a, b):\n",
    "    return a + b\n",
    "\n",
    "add(10,10)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "id": "unlike-courage",
   "metadata": {},
   "outputs": [],
   "source": [
    "texts = '삼성전자의 삼성 갤럭시 폴드3는 삼성 전자에서 출시를 하였다'"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "id": "3023c7d3-f19b-45be-96d8-1f3011ee29cd",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "18"
      ]
     },
     "execution_count": 10,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "texts.find('삼성 전자')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "id": "b63b6cbd-dc20-4ee9-b330-6514e2e96c06",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'삼성전자의 삼성 갤럭시 폴드3는 삼성전자에서 출시를 하였다'"
      ]
     },
     "execution_count": 11,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "texts.replace('삼성 전자', '삼성전자')"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "532a5ee0-ea40-43f1-8e76-86bf7fd81fb7",
   "metadata": {},
   "outputs": [],
   "source": [
    "results = {}\n",
    "results["
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "d569cdb4-014e-4c73-8f54-b2ebb84df1c3",
   "metadata": {},
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "3dd624c0-5a42-404b-b7bb-6e227d812ecc",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Collecting yaspin\n",
      "  Downloading yaspin-2.0.0-py3-none-any.whl (24 kB)\n",
      "Requirement already satisfied: termcolor<2.0.0,>=1.1.0 in /home/buffet/Coding/Python/Nlpy/lib/python3.8/site-packages (from yaspin) (1.1.0)\n",
      "Installing collected packages: yaspin\n",
      "Successfully installed yaspin-2.0.0\n"
     ]
    }
   ],
   "source": [
    "! pip install yaspin"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "8e612230-e736-4565-903d-1639fc194053",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "\u001b[K0m \u001b[K"
     ]
    }
   ],
   "source": [
    "# https://github.com/pavdmyt/yaspin\n",
    "import time\n",
    "from yaspin import yaspin\n",
    "\n",
    "# Context manager:\n",
    "with yaspin():\n",
    "    time.sleep(3)  # time consuming code"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "f391139a-fd86-45b4-9522-83aca69b6dc4",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "\u001b[K0m Loading...\u001b[K"
     ]
    }
   ],
   "source": [
    "# Function decorator:\n",
    "@yaspin(text=\"Loading...\")\n",
    "def some_operations():\n",
    "    time.sleep(3)  # time consuming code\n",
    "\n",
    "some_operations()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "84bd702a-a893-463d-b88a-f8eb7766ea0a",
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3 (ipykernel)",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
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