sspai-100-hours-series-python/code/newsletter/N3/functools.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# reduce"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "[1, 2, 3, 4, 5]"
      ]
     },
     "execution_count": 11,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "from functools import reduce\n",
    "\n",
    "numbers = list(range(1, 6))\n",
    "numbers"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "15"
      ]
     },
     "execution_count": 12,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "int(reduce(lambda x, y: x + y, numbers))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "120"
      ]
     },
     "execution_count": 13,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "int(reduce(lambda x, y: x * y, numbers))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 21,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "15"
      ]
     },
     "execution_count": 21,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "def accumulate(sequence):\n",
    "    result = sequence[0]\n",
    "    for index, _ in enumerate(sequence[1:], start=1):\n",
    "        right = sequence[index]\n",
    "        result += right\n",
    "\n",
    "    return result\n",
    "\n",
    "accumulate(numbers)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 22,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "25"
      ]
     },
     "execution_count": 22,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "int(reduce(lambda x, y: x+y, numbers, 10))"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# partial"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 36,
   "metadata": {},
   "outputs": [],
   "source": [
    "from functools import partial\n",
    "from math import log\n",
    "\n",
    "def custom_log(x, base):\n",
    "    return log(x, base)\n",
    "\n",
    "log2 = partial(custom_log, base=2)\n",
    "log10 = partial(custom_log, base=10)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 38,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "2.0"
      ]
     },
     "execution_count": 38,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "log2(4)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 39,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "2.0"
      ]
     },
     "execution_count": 39,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "log10(100)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 40,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "2.0"
      ]
     },
     "execution_count": 40,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "log2(9, base=3)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# wraps"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### without wraps function"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 42,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Monitoring request...\n",
      "request https://sspai.com using GET method...\n"
     ]
    }
   ],
   "source": [
    "def monitor(func):\n",
    "    print(f\"Monitoring {func.__name__}...\")    \n",
    "    def wrapper(*args, **kwargs):\n",
    "        return func(*args, **kwargs)\n",
    "    return wrapper\n",
    "\n",
    "@monitor\n",
    "def request(url, method=\"GET\"):\n",
    "    \"\"\"Request from target url\n",
    "    :param url: string, the target url.\n",
    "    :param method: string, the request method, default is GET.\n",
    "    \"\"\"\n",
    "    print(f\"request {url} using {method} method...\")\n",
    "\n",
    "request(\"https://sspai.com\")\n"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 46,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "<function __main__.monitor.<locals>.wrapper(*args, **kwargs)>"
      ]
     },
     "execution_count": 46,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "request"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 47,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "wrapper\n",
      "None\n"
     ]
    }
   ],
   "source": [
    "print(request.__name__)\n",
    "print(request.__doc__)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### with wraps function"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 48,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Monitoring request...\n",
      "request https://sspai.com using GET method...\n"
     ]
    }
   ],
   "source": [
    "from functools import wraps\n",
    "\n",
    "def monitor(func):\n",
    "    print(f\"Monitoring {func.__name__}...\")\n",
    "\n",
    "    @wraps(func)\n",
    "    def wrapper(*args, **kwargs):\n",
    "        return func(*args, **kwargs)\n",
    "    return wrapper\n",
    "\n",
    "@monitor\n",
    "def request(url, method=\"GET\"):\n",
    "    \"\"\"Request from target url\n",
    "    :param url: string, the target url.\n",
    "    :param method: string, the request method, default is GET.\n",
    "    \"\"\"\n",
    "    print(f\"request {url} using {method} method...\")\n",
    "\n",
    "request(\"https://sspai.com\")"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 49,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "<function __main__.request(url, method='GET')>"
      ]
     },
     "execution_count": 49,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "request"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 50,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "request\n",
      "Request from target url\n",
      "    :param url: string, the target url.\n",
      "    :param method: string, the request method, default is GET.\n",
      "    \n"
     ]
    }
   ],
   "source": [
    "print(request.__name__)\n",
    "print(request.__doc__)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {},
   "outputs": [],
   "source": []
  }
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