{
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   "metadata": {
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   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "inner: 2\n",
      "outer: 1\n",
      "global: 0\n"
     ]
    }
   ],
   "source": [
    "x = 0\n",
    "def outer():\n",
    "    x = 1\n",
    "    def inner():\n",
    "        x = 2\n",
    "        print(\"inner:\", x)\n",
    "\n",
    "    inner()\n",
    "    print(\"outer:\", x)\n",
    "\n",
    "outer()\n",
    "print(\"global:\", x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "inner: 2\n",
      "outer: 2\n",
      "global: 0\n"
     ]
    }
   ],
   "source": [
    "x = 0\n",
    "def outer():\n",
    "    x = 1\n",
    "    def inner():\n",
    "        nonlocal x\n",
    "        x = 2\n",
    "        print(\"inner:\", x)\n",
    "\n",
    "    inner()\n",
    "    print(\"outer:\", x)\n",
    "\n",
    "outer()\n",
    "print(\"global:\", x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": []
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": []
  }
 ],
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   "language": "python",
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