sspai-100-hours-series-python/projects/click-cli/click-usage/decorator.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Curry and Closure"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "initializing for request function.\n",
      "<function init.<locals>.wrapper at 0x7fb82839f0d0>\n",
      "Query for https://www.sspai.com using GET method.\n",
      "response\n"
     ]
    }
   ],
   "source": [
    "# Initialization without decorator\n",
    "\n",
    "def init(func):\n",
    "    print(f\"initializing for {func.__name__} function.\")\n",
    "    def wrapper(*args, **kwargs):\n",
    "        return func(*args, **kwargs)\n",
    "    return wrapper\n",
    "\n",
    "def request(url, method):\n",
    "    print(f\"Query for {url} using {method} method.\")\n",
    "    return \"response\"\n",
    "\n",
    "prepared_request = init(func=request)\n",
    "print(prepared_request)\n",
    "response = prepared_request(\"https://www.sspai.com\", method=\"GET\")\n",
    "print(response)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "initializing for request function.\n",
      "Query for https://www.sspai.com using GET method.\n",
      "response\n"
     ]
    }
   ],
   "source": [
    "\n",
    "# Initialization wit decorator\n",
    "\n",
    "def init(func):\n",
    "    print(f\"initializing for {func.__name__} function.\")\n",
    "    def wrapper(*args, **kwargs):\n",
    "        return func(*args, **kwargs)\n",
    "    return wrapper\n",
    "\n",
    "@init\n",
    "def request(url, method):\n",
    "    print(f\"Query for {url} using {method} method.\")\n",
    "    return \"response\"\n",
    "\n",
    "response = request(\"https://www.sspai.com\", method=\"GET\")\n",
    "print(response)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "initializing for request function.\n",
      "Use headers: {'User-Agent': 'Chrome/101.0.4951.64'}\n",
      "Query for https://www.sspai.com using GET method.\n",
      "None\n"
     ]
    }
   ],
   "source": [
    "# Initialization with closure\n",
    "\n",
    "def init(func):\n",
    "    headers = {\"User-Agent\": \"Chrome/101.0.4951.64\"}\n",
    "    print(f\"initializing for {func.__name__} function.\")\n",
    "    def wrapper(*args, **kwargs):\n",
    "        result = func(headers=headers, *args, **kwargs)\n",
    "        return result\n",
    "    return wrapper\n",
    "\n",
    "@init\n",
    "def request(url, method, **kwargs):\n",
    "    headers = kwargs.get(\"headers\", None)\n",
    "    if headers:\n",
    "        print(f\"Use headers: {headers}\")\n",
    "    print(f\"Query for {url} using {method} method.\")\n",
    "\n",
    "response = request(\"https://www.sspai.com\", method=\"GET\")\n",
    "print(response)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [],
   "source": [
    "# currying function\n",
    "\n",
    "def curry(func):\n",
    "\n",
    "    f_args = []\n",
    "\n",
    "    def wrapper(*args):\n",
    "        if args:\n",
    "            f_args.extend(args)\n",
    "            return wrapper\n",
    "\n",
    "        result = func(f_args)\n",
    "        return result\n",
    "\n",
    "    return wrapper\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "the result is <function curry.<locals>.wrapper at 0x7fb820779b80> before evaling.\n",
      "the result is 145 after evaling.\n"
     ]
    }
   ],
   "source": [
    "total = curry(sum)\n",
    "result = total(1)(2)(3, 4)(5, 6)(7, 8, 9)(10, 20, 30, 40)\n",
    "print(f\"the result is {result} before evaling.\")\n",
    "result = result()\n",
    "print(f\"the result is {result} after evaling.\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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