Pythonウォーミングアップ.ipynb

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  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "## Python ウォーミングアップ\n",
    "まずはPythonで簡単な計算をしてみましょう。各自の画面中の IPython Notebook のセルに順次入力して（コピペ可）、「Shift + Enter」してください。\n",
    "\n",
    "シャープ # を付けるとコメントと見なされ、それ以降の文字はPythonプログラムに無視されます。"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "3"
      ]
     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# 簡単な足し算をする\n",
    "1 + 2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "# 数字を変数に代入する\n",
    "a = 4\n",
    "b = 5"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "text/plain": [
       "20"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "# 代入した変数同士の掛け算\n",
    "a * b"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "# 「リスト」というデータ構造に「data1」という名前をつけ、数字の組を代入する\n",
    "data1 = [1, 2, 3, 4, 5]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[1, 2, 3, 4, 5]\n"
     ]
    }
   ],
   "source": [
    "# data1 の中身を確認する\n",
    "print(data1)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "ここから先のプログラムでは、インデント（文頭の空白文字）や、文末の「:」（コロン）などを正しく記述しないと、思った通りの動作をしなくなります。注意して使ってください。"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "2\n",
      "4\n",
      "6\n",
      "8\n",
      "10\n"
     ]
    }
   ],
   "source": [
    "# 「for文」を使って、リストの中身を１個１個取り出し、２倍して返す。\n",
    "for n in data1:\n",
    "    print(n * 2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "# 上と同じことをする関数を定義する\n",
    "def double(list):\n",
    "    for n in list:\n",
    "        print(n * 2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "2\n",
      "4\n",
      "6\n",
      "8\n",
      "10\n"
     ]
    }
   ],
   "source": [
    "# 作った関数を呼び出して実行する。\n",
    "double(data1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "# ２つのリスト中の個々の数字同士を掛け算して新しいリストを作る関数を定義する\n",
    "def multiply(list1, list2):\n",
    "    new_list = []\n",
    "    for n, m in zip(list1, list2):\n",
    "        new_list.append(n * m)\n",
    "    return new_list"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "# ２つめのリストを作る\n",
    "data2 = [9, 8, 7, 6, 5]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[9, 16, 21, 24, 25]\n"
     ]
    }
   ],
   "source": [
    "# 作った関数を呼び出して使う\n",
    "print(multiply(data1, data2))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "# ２つのリスト中の数字の全ての組み合わせを掛け算して新しいリストを作る関数を定義する\n",
    "def all_combination(list1, list2):\n",
    "    new_list = []\n",
    "    for n in list1:\n",
    "        for m in list2:\n",
    "            new_list.append(n * m)\n",
    "    return new_list"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[9, 8, 7, 6, 5, 18, 16, 14, 12, 10, 27, 24, 21, 18, 15, 36, 32, 28, 24, 20, 45, 40, 35, 30, 25]\n"
     ]
    }
   ],
   "source": [
    "# 作った関数を呼び出して使う\n",
    "print(all_combination(data1, data2))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  }
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