rx.ipynb

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    "\n",
    "install\n",
    "\n",
    "```\n",
    "pip install rx\n",
    "```\n"
   ]
  },
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     "text": [
      "Got: 84\nGot: 88\n"
     ]
    }
   ],
   "source": [
    "from rx.subjects import Subject\n",
    "\n",
    "\n",
    "def is_even(num):\n",
    "    \"\"\"\n",
    "    偶数かどうかを判定する。filterで呼び出されている。\n",
    "    TrueかFalseを返すのであって、数値自体は返さない。\n",
    "    :param num: \n",
    "    :return: Bool\n",
    "    \"\"\"\n",
    "    return num % 2 == 0\n",
    "\n",
    "\n",
    "def double(num):\n",
    "    \"\"\"\n",
    "    受け取った値を倍返し\n",
    "    :param num: \n",
    "    :return: int\n",
    "    \"\"\"\n",
    "    return num * 2\n",
    "\n",
    "\n",
    "# subjectを作成\n",
    "stream = Subject()\n",
    "# 一連の処理を作成する。投げられた値が偶数だったら倍にして表示する。\n",
    "d = stream\\\n",
    "    .filter(is_even) \\\n",
    "    .map(double) \\\n",
    "    .subscribe(lambda x: print(\"Got: %s\" % x))\n",
    "\n",
    "# 試しに値をなんぼか送信\n",
    "stream.on_next(42)\n",
    "stream.on_next(43)\n",
    "stream.on_next(44)\n",
    "stream.on_next(45)\n",
    "\n",
    "# disposeしたあとに値を送信しても何もおこらない。\n",
    "d.dispose()\n",
    "stream.on_next(46)"
   ]
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