Adds a space after series of hash marks at the beginning of lines. The purpose is to fix markdown headers that didn't include a space after heading hash marks. USE AT YOUR OWN RISK.

FixMarkDownHeaders.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": null,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "import os\n",
    "import re\n",
    "\n",
    "searchdir='.'\n",
    "os.chdir(searchdir)\n",
    "\n",
    "pattern = re.compile(r'(\\n\\s*\"#+)([^\\s#])')\n",
    "\n",
    "ext_list = ['ipynb']\n",
    "exclude_dirs = ['.ipynb_checkpoints']\n",
    "\n",
    "fixed_files = []\n",
    "for dirpath, dirnames, filenames in os.walk('.'):\n",
    "    dirnames[:] = [d for d in dirnames if d not in exclude_dirs]\n",
    "    filtered_filenames = [fname for fname in filenames if fname.split('.')[-1] in ext_list]\n",
    "    \n",
    "    for fname in filtered_filenames:\n",
    "        file = dirpath + '/' + fname\n",
    "        try:\n",
    "            with open(file, encoding=\"utf-8\") as f:\n",
    "                content = f.read()\n",
    "            if pattern.search(content):\n",
    "                fixed_content = pattern.sub(r'\\1 \\2',content)\n",
    "                with open(file,'w', encoding=\"utf-8\") as f2:\n",
    "                    f2.write(fixed_content)\n",
    "                fixed_files.append(file)\n",
    "        except Exception as e:\n",
    "            print(file, e)\n",
    "\n",
    "print( '{} files fixed.'.format(len(fixed_files) ) )\n",
    "      \n",
    "for i, file in enumerate(fixed_files,1):\n",
    "    print( '{}. {}'.format(i,file) )"
   ]
  }
 ],
 "metadata": {
  "kernelspec": {
   "display_name": "Python 3",
   "language": "python",
   "name": "python3"
  },
  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
   "version": "3.4.3"
  }
 },
 "nbformat": 4,
 "nbformat_minor": 0
}