mdx_nikola fix.ipynb

{
 "metadata": {
  "name": ""
 },
 "nbformat": 3,
 "nbformat_minor": 0,
 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "heading",
     "level": 1,
     "metadata": {},
     "source": [
      "Preparations"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "document = \"\"\"\n",
      "<h1>hello</h1>\n",
      "<h1>hi</h1>\n",
      "<h2>mornin'</h2>\n",
      "\"\"\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 9
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import lxml.html\n",
      "lxmldoc = lxml.html.fromstring(document)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 10
    },
    {
     "cell_type": "heading",
     "level": 1,
     "metadata": {},
     "source": [
      "Testing"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "h1s = lxmldoc.xpath('//h1')"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 14
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "h1 = h1s[0]\n",
      "h1.tag = 'h2'\n",
      "h1"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 21,
       "text": [
        "<Element h2 at 0x7fb19411d770>"
       ]
      }
     ],
     "prompt_number": 21
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "lxml.html.tostring(lxmldoc)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 20,
       "text": [
        "b\"<div><h2>hello</h2>\\n<h1>hi</h1>\\n<h2>mornin'</h2>\\n</div>\""
       ]
      }
     ],
     "prompt_number": 20
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "h1.tag = 'h1' #back to the original version"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 22
    },
    {
     "cell_type": "heading",
     "level": 1,
     "metadata": {},
     "source": [
      "Actual solution"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def change_headers(lxmldoc):\n",
      "    for i in reversed(range(1, 6)): #html headers go to 6, so we can\u2019t \u201clower\u201d beneath five\n",
      "        elements = lxmldoc.xpath('//h' + str(i))\n",
      "        for e in elements:\n",
      "            e.tag = 'h' + str(i + 1)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 23
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "change_headers(lxmldoc)\n",
      "lxml.html.tostring(lxmldoc)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 24,
       "text": [
        "b\"<div><h2>hello</h2>\\n<h2>hi</h2>\\n<h3>mornin'</h3>\\n</div>\""
       ]
      }
     ],
     "prompt_number": 24
    }
   ],
   "metadata": {}
  }
 ]
}