article/library/python/018/018_nb.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 辞書型の引数をアンパックして代入する\n",
    "\n",
    "多くの引数を一度に代入するとき、辞書型の引数をアンパックして代入するととても便利である。\n",
    "忘れないようにメモしておく。\n",
    "\n",
    "### github\n",
    "- githubのjupyter notebook形式のファイルは[こちら](https://github.com/hiroshi0530/wa-src/blob/master/article/library/python/018/018_nb.ipynb)\n",
    "\n",
    "### google colaboratory\n",
    "- google colaboratory で実行する場合は[こちら](https://colab.research.google.com/github/hiroshi0530/wa-src/blob/master/article/library/python/018/018_nb.ipynb)\n",
    "\n",
    "### 筆者の環境"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "ProductName:\tMac OS X\r\n",
      "ProductVersion:\t10.14.6\r\n",
      "BuildVersion:\t18G9323\r\n"
     ]
    }
   ],
   "source": [
    "!sw_vers"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "Python 3.8.5\r\n"
     ]
    }
   ],
   "source": [
    "!python -V"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## 三つの引数を持つ関数を用意"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [],
   "source": [
    "def test(a,b,c):\n",
    "  print('a : ', a)\n",
    "  print('b : ', b)\n",
    "  print('c : ', c)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### リスト型をアンパックして代入する"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "a :  123\n",
      "b :  456\n",
      "c :  789\n"
     ]
    }
   ],
   "source": [
    "arg = [\n",
    "   '123',\n",
    "   '456',\n",
    "   '789',\n",
    "]\n",
    "\n",
    "test(*arg)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 辞書型をアンパックして代入する"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "a :  123\n",
      "b :  456\n",
      "c :  789\n"
     ]
    }
   ],
   "source": [
    "arg = {\n",
    "  'a': '123',\n",
    "  'b': '456',\n",
    "  'c': '789',\n",
    "}\n",
    "\n",
    "test(**arg)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "簡単例だが後から遡れるようにメモ。"
   ]
  }
 ],
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  "kernelspec": {
   "display_name": "Python 3",
   "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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