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   "cell_type": "markdown",
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   "source": [
    "# Installation\n",
    "\n",
    "```pip install cython```\n",
    "\n",
    "# Using inside Jupyter notebook\n",
    "\n",
    "Load th cythonmagic extension."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "%load_ext cython"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Then, simply use the magic function to start writing cython code."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "45\n"
     ]
    }
   ],
   "source": [
    "%%cython\n",
    "\n",
    "cdef int a = 0\n",
    "for i in range(10):\n",
    "    a += i\n",
    "print(a)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Add `--annotate` or `-a` for showing a code analysis of the compiled code"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "45\n"
     ]
    },
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