Notebook для м/к по регуляркам

regex.ipynb

{
 "metadata": {
  "name": ""
 },
 "nbformat": 3,
 "nbformat_minor": 0,
 "worksheets": [
  {
   "cells": [
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "# \u0420\u0435\u0433\u0443\u043b\u044f\u0440\u043d\u044b\u0435 \u0432\u044b\u0440\u0430\u0436\u0435\u043d\u0438\u044f\n",
      "## \u0418\u0442\u0430\u043a:"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "import re"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 1
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "\u0420\u0435\u0433\u0443\u043b\u044f\u0440\u043a\u0438 \u0441\u043e\u0441\u0442\u043e\u044f\u0442 \u0438\u0437\n",
      "\n",
      "- *\u043b\u044e\u0431\u043e\u0433\u043e \u0441\u0438\u043c\u0432\u043e\u043b\u0430*\n",
      "- \u043a\u043b\u0430\u0441\u0441\u043e\u0432 \u0441\u0438\u043c\u0432\u043e\u043b\u043e\u0432\n",
      "- \u043a\u0432\u0430\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u043e\u0432\n",
      "- *\u044f\u043a\u043e\u0440\u0435\u0439*\n",
      "- \u0441\u0438\u043c\u0432\u043e\u043b\u043e\u0432 \u0433\u0440\u0443\u043f\u043f\u0438\u0440\u043e\u0432\u043a\u0438\n",
      "- \u043f\u0435\u0440\u0435\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u0439\n",
      "- \u043a\u043e\u043c\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0435\u0432\n",
      "- \u043c\u043e\u0434\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u043e\u0432\n",
      "- *\u0437\u0430\u0433\u043b\u044f\u0434\u044b\u0432\u0430\u043d\u0438\u0439* \u0432\u043f\u0435\u0440\u0435\u0434/\u043d\u0430\u0437\u0430\u0434"
     ]
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "### \u0421\u0438\u043c\u0432\u043e\u043b\u044b: \u043b\u044e\u0431\u043e\u0439 \u0438 \u043a\u043b\u0430\u0441\u0441\u044b"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "def m(r, s):\n",
      "    match = re.match(r, s)\n",
      "    if match:\n",
      "        return match.group()\n",
      "    return \"Nope!\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 2
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# . \\d \\D \\s \\S \\w \\W [^...-...]\n",
      "l = ['a', 'B', ' ', '\\t', '1', '0']\n",
      "def select(r, xs):\n",
      "    return [m.group() for m in (re.match(r, x) for x in xs) if m]\n",
      "print select('\\d', l), '\u0446\u0438\u0444\u0440\u044b'\n",
      "print select('\\D', l), '\u041d\u0415 \u0446\u0438\u0444\u0440\u044b'\n",
      "print select('\\s', l), '\u043f\u0440\u043e\u0431\u0435\u043b\u044c\u043d\u044b\u0435 \u0441\u0438\u043c\u0432\u043e\u043b\u044b'\n",
      "print select('\\S', l), '\u041d\u0415 \u043f\u0440\u043e\u0431\u0435\u043b\u044c\u043d\u044b\u0435 \u0441\u0438\u043c\u0432\u043e\u043b\u044b'\n",
      "print select('\\w', l), '\u0431\u0443\u043a\u0432\u0435\u043d\u043d\u043e-\u0446\u0438\u0444\u0440\u043e\u0432\u044b\u0435 \u0441\u0438\u043c\u0432\u043e\u043b\u044b'\n",
      "print select('\\W', l), '\u041d\u0415 \u0431\u0443\u043a\u0432\u0435\u043d\u043d\u043e-\u0446\u0438\u0444\u0440\u043e\u0432\u044b\u0435 \u0441\u0438\u043c\u0432\u043e\u043b\u044b'"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "['1', '0'] \u0446\u0438\u0444\u0440\u044b\n",
        "['a', 'B', ' ', '\\t'] \u041d\u0415 \u0446\u0438\u0444\u0440\u044b\n",
        "[' ', '\\t'] \u043f\u0440\u043e\u0431\u0435\u043b\u044c\u043d\u044b\u0435 \u0441\u0438\u043c\u0432\u043e\u043b\u044b\n",
        "['a', 'B', '1', '0'] \u041d\u0415 \u043f\u0440\u043e\u0431\u0435\u043b\u044c\u043d\u044b\u0435 \u0441\u0438\u043c\u0432\u043e\u043b\u044b\n",
        "['a', 'B', '1', '0'] \u0431\u0443\u043a\u0432\u0435\u043d\u043d\u043e-\u0446\u0438\u0444\u0440\u043e\u0432\u044b\u0435 \u0441\u0438\u043c\u0432\u043e\u043b\u044b\n",
        "[' ', '\\t'] \u041d\u0415 \u0431\u0443\u043a\u0432\u0435\u043d\u043d\u043e-\u0446\u0438\u0444\u0440\u043e\u0432\u044b\u0435 \u0441\u0438\u043c\u0432\u043e\u043b\u044b\n"
       ]
      }
     ],
     "prompt_number": 3
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "### \u041a\u0432\u0430\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b, \u0436\u0430\u0434\u043d\u044b\u0435 \u0438 \u043d\u0435 \u043e\u0447\u0435\u043d\u044c"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# ? + * {}\n",
      "l = ['aaa', 'aab', 'abb', 'bbb']\n",
      "print select(r'a*', l), \"\u0431\u0435\u0440\u0443 \u043b\u044e\u0431\u043e\u0435 \u043a\u043e\u043b-\u0432\u043e \\\"a\\\", \u0434\u0430\u0436\u0435 \u043d\u0443\u043b\u0435\u0432\u043e\u0435!\"\n",
      "print select(r'a+', l), \"\u043b\u044e\u0431\u043e\u0435 \u043d\u0435\u043d\u0443\u043b\u0435\u0432\u043e\u0435 \u043a\u043e\u043b-\u0432\u043e, \u0431\u0435\u0440\u0443 \u0432\u0441\u0451!\"\n",
      "print select(r'a*?', l), \"\u0445\u043e\u0447\u0443 0+, \u0431\u0435\u0440\u0443 \u043c\u0438\u043d\u0438\u043c\u0443\u043c (\u0442.\u0435. \u043d\u0435 \u0432\u043e\u0437\u044c\u043c\u0443 \u043d\u0438\u0447\u0435\u0433\u043e!)\"\n",
      "print select(r'a+?', l), \"\u0445\u043e\u0447\u0443 1+, \u0431\u0435\u0440\u0443 \u043c\u0438\u043d\u0438\u043c\u0443\u043c (\u0442.\u0435. \u043e\u0434\u043d\u0443 \u0448\u0442\u0443\u043a\u0443)\"\n",
      "print select(r'a?', l), \"\u0445\u043e\u0447\u0443 (\u0438 \u0431\u0435\u0440\u0443) \u043e\u0434\u043d\u0443 \u0438\u043b\u0438 \u043d\u0438\u0447\u0435\u0433\u043e!\"\n",
      "print select(r'a{,2}', l), \"\u0445\u043e\u0447\u0443 (\u0438 \u0431\u0435\u0440\u0443) \u0434\u043e \u0434\u0432\u0443\u0445 \u0448\u0442\u0443\u043a!\"\n",
      "print select(r'a{1,2}?', l), \"\u0445\u043e\u0447\u0443 \u043e\u0434\u043d\u0443-\u0434\u0432\u0435 \u0448\u0442\u0443\u043a\u0438, \u0432\u043e\u0437\u044c\u043c\u0443 \u043c\u0438\u043d\u0438\u043c\u0443\u043c (\u043e\u0434\u043d\u0443)!\"\n",
      "print select(r'a{2}', l), \"\u0445\u043e\u0447\u0443 (\u0438 \u0431\u0435\u0440\u0443) \u0440\u043e\u0432\u043d\u043e \u0434\u0432\u0435!\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "['aaa', 'aa', 'a', ''] \u0431\u0435\u0440\u0443 \u043b\u044e\u0431\u043e\u0435 \u043a\u043e\u043b-\u0432\u043e \"a\", \u0434\u0430\u0436\u0435 \u043d\u0443\u043b\u0435\u0432\u043e\u0435!\n",
        "['aaa', 'aa', 'a'] \u043b\u044e\u0431\u043e\u0435 \u043d\u0435\u043d\u0443\u043b\u0435\u0432\u043e\u0435 \u043a\u043e\u043b-\u0432\u043e, \u0431\u0435\u0440\u0443 \u0432\u0441\u0451!\n",
        "['', '', '', ''] \u0445\u043e\u0447\u0443 0+, \u0431\u0435\u0440\u0443 \u043c\u0438\u043d\u0438\u043c\u0443\u043c (\u0442.\u0435. \u043d\u0435 \u0432\u043e\u0437\u044c\u043c\u0443 \u043d\u0438\u0447\u0435\u0433\u043e!)\n",
        "['a', 'a', 'a'] \u0445\u043e\u0447\u0443 1+, \u0431\u0435\u0440\u0443 \u043c\u0438\u043d\u0438\u043c\u0443\u043c (\u0442.\u0435. \u043e\u0434\u043d\u0443 \u0448\u0442\u0443\u043a\u0443)\n",
        "['a', 'a', 'a', ''] \u0445\u043e\u0447\u0443 (\u0438 \u0431\u0435\u0440\u0443) \u043e\u0434\u043d\u0443 \u0438\u043b\u0438 \u043d\u0438\u0447\u0435\u0433\u043e!\n",
        "['aa', 'aa', 'a', ''] \u0445\u043e\u0447\u0443 (\u0438 \u0431\u0435\u0440\u0443) \u0434\u043e \u0434\u0432\u0443\u0445 \u0448\u0442\u0443\u043a!\n",
        "['a', 'a', 'a'] \u0445\u043e\u0447\u0443 \u043e\u0434\u043d\u0443-\u0434\u0432\u0435 \u0448\u0442\u0443\u043a\u0438, \u0432\u043e\u0437\u044c\u043c\u0443 \u043c\u0438\u043d\u0438\u043c\u0443\u043c (\u043e\u0434\u043d\u0443)!\n",
        "['aa', 'aa'] \u0445\u043e\u0447\u0443 (\u0438 \u0431\u0435\u0440\u0443) \u0440\u043e\u0432\u043d\u043e \u0434\u0432\u0435!\n"
       ]
      }
     ],
     "prompt_number": 4
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "### \u042f\u043a\u043e\u0440\u044f"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# ^ $ \\b \\B\n",
      "s = 'aa,a ab aa aaa'\n",
      "print re.findall(r'a+', s), \"\u0432\u044b\u0431\u0438\u0440\u0430\u044e \u0441\u043b\u043e\u0432\u0430 \u043f\u043e \u043f\u043e\u0434\u0441\u0442\u0440\u043e\u043a\u0435, \u043d\u043e \u043c\u043e\u0433\u0443\u0442 \u0431\u044b\u0442\u044c \u043d\u0435\u0432\u0435\u0440\u043d\u044b\u0435 \u0432\u044b\u0431\u043e\u0440\u043a\u0438!\"\n",
      "print re.findall(r'\\Wa+\\W', s), \"\u0432\u044b\u0431\u0438\u0440\u0430\u044e \u0441\u043b\u043e\u0432\u0430 \u0441 \u043d\u0435\u0431\u0443\u043a\u0432\u0430\u043c\u0438 \u043f\u043e \u0431\u043e\u043a\u0430\u043c \u0438 \u0431\u0435\u0440\u0443 \u0432\u043c\u0435\u0441\u0442\u0435 \u0441 \u043d\u0435\u0431\u0443\u043a\u0432\u0430\u043c\u0438\"\n",
      "print re.findall(r'\\sa+\\s', s), \"\u0432\u044b\u0431\u0438\u0440\u0430\u044e \u0441\u043b\u043e\u0432\u0430 \u0441 \u043f\u0440\u043e\u0431\u0435\u043b\u0430\u043c\u0438 \u043f\u043e \u0431\u043e\u043a\u0430\u043c \u0438 \u0431\u0435\u0440\u0443 \u0432\u043c\u0435\u0441\u0442\u0435 \u0441 \u043f\u0440\u043e\u0431\u0435\u043b\u0430\u043c\u0438\"\n",
      "print re.findall(r'\\ba+\\b', s), \"\u0432\u044b\u0431\u0438\u0440\u0430\u044e \u0441\u043b\u043e\u0432\u0430 \u043f\u043e \u0433\u0440\u0430\u043d\u0438\u0446\u0430\u043c \u0441\u043b\u043e\u0432, \u043d\u0435 \u0431\u0435\u0440\u0443 \u0441\u0430\u043c\u0438 \u0433\u0440\u0430\u043d\u0438\u0446\u044b!\"\n",
      "print re.findall(r'^a+', s), \"\u0432\u044b\u0431\u0438\u0440\u0430\u044e \u0441\u043b\u043e\u0432\u043e \u0432 \u043d\u0430\u0447\u0430\u043b\u0435 \u0441\u0442\u0440\u043e\u043a\u0438\"\n",
      "print re.findall(r'a+$', s), \"\u0432\u044b\u0431\u0438\u0440\u0430\u044e \u0441\u043b\u043e\u0432\u043e \u0432 \u043a\u043e\u043d\u0446\u0435 \u0441\u0442\u0440\u043e\u043a\u0438\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "['aa', 'a', 'a', 'aa', 'aaa'] \u0432\u044b\u0431\u0438\u0440\u0430\u044e \u0441\u043b\u043e\u0432\u0430 \u043f\u043e \u043f\u043e\u0434\u0441\u0442\u0440\u043e\u043a\u0435, \u043d\u043e \u043c\u043e\u0433\u0443\u0442 \u0431\u044b\u0442\u044c \u043d\u0435\u0432\u0435\u0440\u043d\u044b\u0435 \u0432\u044b\u0431\u043e\u0440\u043a\u0438!\n",
        "[',a ', ' aa '] \u0432\u044b\u0431\u0438\u0440\u0430\u044e \u0441\u043b\u043e\u0432\u0430 \u0441 \u043d\u0435\u0431\u0443\u043a\u0432\u0430\u043c\u0438 \u043f\u043e \u0431\u043e\u043a\u0430\u043c \u0438 \u0431\u0435\u0440\u0443 \u0432\u043c\u0435\u0441\u0442\u0435 \u0441 \u043d\u0435\u0431\u0443\u043a\u0432\u0430\u043c\u0438\n",
        "[' aa '] \u0432\u044b\u0431\u0438\u0440\u0430\u044e \u0441\u043b\u043e\u0432\u0430 \u0441 \u043f\u0440\u043e\u0431\u0435\u043b\u0430\u043c\u0438 \u043f\u043e \u0431\u043e\u043a\u0430\u043c \u0438 \u0431\u0435\u0440\u0443 \u0432\u043c\u0435\u0441\u0442\u0435 \u0441 \u043f\u0440\u043e\u0431\u0435\u043b\u0430\u043c\u0438\n",
        "['aa', 'a', 'aa', 'aaa'] \u0432\u044b\u0431\u0438\u0440\u0430\u044e \u0441\u043b\u043e\u0432\u0430 \u043f\u043e \u0433\u0440\u0430\u043d\u0438\u0446\u0430\u043c \u0441\u043b\u043e\u0432, \u043d\u0435 \u0431\u0435\u0440\u0443 \u0441\u0430\u043c\u0438 \u0433\u0440\u0430\u043d\u0438\u0446\u044b!\n",
        "['aa'] \u0432\u044b\u0431\u0438\u0440\u0430\u044e \u0441\u043b\u043e\u0432\u043e \u0432 \u043d\u0430\u0447\u0430\u043b\u0435 \u0441\u0442\u0440\u043e\u043a\u0438\n",
        "['aaa'] \u0432\u044b\u0431\u0438\u0440\u0430\u044e \u0441\u043b\u043e\u0432\u043e \u0432 \u043a\u043e\u043d\u0446\u0435 \u0441\u0442\u0440\u043e\u043a\u0438\n"
       ]
      }
     ],
     "prompt_number": 5
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "### \u0413\u0440\u0443\u043f\u043f\u0438\u0440\u043e\u0432\u043a\u0430 \u0441 \u043e\u0431\u0440\u0430\u0442\u043d\u043e\u0439 \u0441\u0432\u044f\u0437\u044c\u044e \u0438 \u0431\u0435\u0437"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# () (?:) (?>) (?P<x>...) \\1 \\2 \\3\n",
      "re.match(r'(a)\\s*(\\d+),?(c)', 'a121233c').groups()"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 6,
       "text": [
        "('a', '121233', 'c')"
       ]
      }
     ],
     "prompt_number": 6
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "print re.match(\n",
      "  r'^([0-9a-fA-F]{1,2})([0-9a-fA-F]{1,2})([0-9a-fA-F]{1,2})$',\n",
      "  'ff00bb'\n",
      ").groups()\n",
      "\n",
      "# \u0432\u0430\u0436\u043d\u043e! \u043a\u0432\u0430\u043d\u0442\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b \u0440\u0430\u0431\u043e\u0442\u0430\u044e\u0442 \u0434\u043b\u044f \u0433\u0440\u0443\u043f\u043f \u043f\u0440\u0438 \u043f\u0440\u043e\u0432\u0435\u0440\u043a\u0435,\n",
      "# \u043d\u043e \u0433\u0440\u0443\u043f\u043f\u044b \u043a\u043e\u043f\u0438\u0440\u0443\u044e\u0442\u0441\u044f \u0432\u043c\u0435\u0441\u0442\u0435 \u0441 \u0438\u043d\u0434\u0435\u043a\u0441\u0430\u043c\u0438, \u043f\u043e\u044d\u0442\u043e\u043c\u0443 \u0432 \u0440\u0435\u0437\u0443\u043b\u044c\u0442\u0430\u0442 \u043f\u043e\u043f\u0430\u0434\u0451\u0442 \u043f\u043e\u0434\u0441\u0442\u0440\u043e\u043a\u0430, \u0437\u0430\u0445\u0432\u0430\u0447\u0435\u043d\u043d\u0430\u044f \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0435\u0439 \u043a\u043e\u043f\u0438\u0435\u0439!\n",
      "print re.match(\n",
      "  r'^([0-9a-fA-F]{1,2}){3}$',\n",
      "  'ff00bb'\n",
      ").groups(), \"\u0421\u0442\u0440\u043e\u043a\u0430 \u0441\u043c\u0430\u0442\u0447\u0438\u043b\u0430\u0441\u044c, \u043d\u043e \u0433\u0440\u0443\u043f\u043f\u0430 \u043e\u0441\u0442\u0430\u043b\u0430\u0441\u044c \u043e\u0434\u043d\u0430!\""
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "('ff', '00', 'bb')\n",
        "('bb',) \u0421\u0442\u0440\u043e\u043a\u0430 \u0441\u043c\u0430\u0442\u0447\u0438\u043b\u0430\u0441\u044c, \u043d\u043e \u0433\u0440\u0443\u043f\u043f\u0430 \u043e\u0441\u0442\u0430\u043b\u0430\u0441\u044c \u043e\u0434\u043d\u0430!\n"
       ]
      }
     ],
     "prompt_number": 7
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "re.findall(r'([\\\"\\']+)(\\d+)\\1', '\"123\" \\'1\\' \"7\\' \"\"4\"\" \"\"\"42\"\"\"')"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 8,
       "text": [
        "[('\"', '123'), (\"'\", '1'), ('\"\"', '4'), ('\"\"\"', '42')]"
       ]
      }
     ],
     "prompt_number": 8
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "re.match(r'^(.?)(.?)(.?).?\\3\\2\\1$', 'acbbca').groups()"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 9,
       "text": [
        "('a', 'c', 'b')"
       ]
      }
     ],
     "prompt_number": 9
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "re.match(r'\\s*(?P<x>\\d+)\\s*,\\s*(?P<y>\\d+)\\s*', '1,2'\n",
      "         ).groupdict()"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 10,
       "text": [
        "{'x': '1', 'y': '2'}"
       ]
      }
     ],
     "prompt_number": 10
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "### \u041f\u0435\u0440\u0435\u0447\u0438\u0441\u043b\u0435\u043d\u0438\u044f"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# a|b"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 11
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "print re.match(r'^((?:\\d+)|(?:[VXI]+))$', '123').groups()\n",
      "print re.match(r'^((?:\\d+)|(?:[VXI]+))$', 'VII').groups()"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "('123',)\n",
        "('VII',)\n"
       ]
      }
     ],
     "prompt_number": 12
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "### \u041a\u043e\u043c\u043c\u0435\u043d\u0442\u0430\u0440\u0438\u0438"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# (?#)\n",
      "re.match(\n",
      "   (\n",
      "      r'^'\n",
      "      r'(?#red)([0-9a-fA-F]{1,2})'\n",
      "      r'(?#green)([0-9a-fA-F]{1,2})'\n",
      "      r'(?#green)([0-9a-fA-F]{1,2})'\n",
      "      r'$'\n",
      "  ),\n",
      "  r'ff00ff'\n",
      ").groups()"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 13,
       "text": [
        "('ff', '00', 'ff')"
       ]
      }
     ],
     "prompt_number": 13
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "### \u041c\u043e\u0434\u0438\u0444\u0438\u043a\u0430\u0442\u043e\u0440\u044b"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# (?ismx)\n",
      "m(r'(?i)a', 'A')"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 14,
       "text": [
        "'A'"
       ]
      }
     ],
     "prompt_number": 14
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "m(r'''(?x)\n",
      "      ^                  # begin of line\n",
      "      ([0-9a-fA-F]{1,2})   # red\n",
      "      ([0-9a-fA-F]{1,2})   # green\n",
      "      ([0-9a-fA-F]{1,2})   # blue\n",
      "      $                  # end of line\n",
      "      ''', 'ff00ff')"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 15,
       "text": [
        "'ff00ff'"
       ]
      }
     ],
     "prompt_number": 15
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "s = 'a\\nab\\nabc'\n",
      "print \"\u043f\u043e-\u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0442\u043e\u0447\u043a\u0430 \u043d\u0435 \u0437\u0430\u0445\u0432\u0430\u0442\u044b\u0432\u0430\u0435\u0442 \u043f\u0435\u0440\u0435\u0432\u043e\u0434\u044b \u0441\u0442\u0440\u043e\u043a, \u0430 ^ \u0438 $ \u043e\u0431\u043e\u0437\u043d\u0430\u0447\u0430\u044e\u0442 \u0433\u0440\u0430\u043d\u0438\u0446\u044b \u0432\u0441\u0435\u0433\u043e \u0442\u0435\u043a\u0441\u0442\u0430:\\n\", (\n",
      "    re.findall(r'^.+$', s))\n",
      "print \"^ \u0438 $ \u0442\u0435\u043f\u0435\u0440\u044c \u043e\u0431\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u044e\u0442 \u043f\u043e\u0434\u0441\u0442\u0440\u043e\u043a\u0438:\\n\", (\n",
      "    re.findall(r'(?m)^.+$', s))\n",
      "print \"\u0442\u043e\u0447\u043a\u0430 \u0437\u0430\u0445\u0432\u0430\u0442\u044b\u0432\u0430\u0435\u0442 \u0438 \u043f\u0435\u0440\u0435\u0432\u043e\u0434\u044b \u0441\u0442\u0440\u043e\u043a:\\n\", (\n",
      "    re.findall(r'(?s)^.+$', s))\n",
      "print \"\\A\\Z \u0432\u0441\u0435\u0433\u0434\u0430 \u043e\u0431\u043e\u0437\u043d\u0430\u0447\u0430\u044e\u0442 \u0433\u0440\u0430\u043d\u0438\u0446\u044b \u0442\u0435\u043a\u0441\u0442\u0430:\"\n",
      "print re.findall(r'\\A.+\\Z', s)\n",
      "print re.findall(r'(?m)\\A.+\\Z', s)\n",
      "print re.findall(r'(?s)\\A.+\\Z', s)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "\u043f\u043e-\u0443\u043c\u043e\u043b\u0447\u0430\u043d\u0438\u044e \u0442\u043e\u0447\u043a\u0430 \u043d\u0435 \u0437\u0430\u0445\u0432\u0430\u0442\u044b\u0432\u0430\u0435\u0442 \u043f\u0435\u0440\u0435\u0432\u043e\u0434\u044b \u0441\u0442\u0440\u043e\u043a, \u0430 ^ \u0438 $ \u043e\u0431\u043e\u0437\u043d\u0430\u0447\u0430\u044e\u0442 \u0433\u0440\u0430\u043d\u0438\u0446\u044b \u0432\u0441\u0435\u0433\u043e \u0442\u0435\u043a\u0441\u0442\u0430:\n",
        "[]\n",
        "^ \u0438 $ \u0442\u0435\u043f\u0435\u0440\u044c \u043e\u0431\u0440\u0430\u0431\u0430\u0442\u044b\u0432\u0430\u044e\u0442 \u043f\u043e\u0434\u0441\u0442\u0440\u043e\u043a\u0438:\n",
        "['a', 'ab', 'abc']\n",
        "\u0442\u043e\u0447\u043a\u0430 \u0437\u0430\u0445\u0432\u0430\u0442\u044b\u0432\u0430\u0435\u0442 \u0438 \u043f\u0435\u0440\u0435\u0432\u043e\u0434\u044b \u0441\u0442\u0440\u043e\u043a:\n",
        "['a\\nab\\nabc']\n",
        "\\A\\Z \u0432\u0441\u0435\u0433\u0434\u0430 \u043e\u0431\u043e\u0437\u043d\u0430\u0447\u0430\u044e\u0442 \u0433\u0440\u0430\u043d\u0438\u0446\u044b \u0442\u0435\u043a\u0441\u0442\u0430:\n",
        "[]\n",
        "[]\n",
        "['a\\nab\\nabc']\n"
       ]
      }
     ],
     "prompt_number": 16
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "### \u0417\u0430\u0433\u043b\u044f\u0434\u044b\u0432\u0430\u043d\u0438\u0435 \u0432\u043f\u0435\u0440\u0435\u0434 \u0438 \u043d\u0430\u0437\u0430\u0434"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# (?=...)(?!...)(?<=...)(?<!...)"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 17
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "re.findall(r'(aaa(?=b))|(bbb(?=a))', 'aaabbbaaaccc')"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 18,
       "text": [
        "[('aaa', ''), ('', 'bbb')]"
       ]
      }
     ],
     "prompt_number": 18
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "re.findall(r'(aaa)(?:b)|(bbb)(?:a)', 'aaabbbaaabbb')"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "metadata": {},
       "output_type": "pyout",
       "prompt_number": 19,
       "text": [
        "[('aaa', ''), ('aaa', '')]"
       ]
      }
     ],
     "prompt_number": 19
    },
    {
     "cell_type": "markdown",
     "metadata": {},
     "source": [
      "## \u041f\u043e\u0438\u0441\u043a/\u0417\u0430\u043c\u0435\u043d\u0430"
     ]
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "# \\1 \\g<n>"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [],
     "prompt_number": 20
    },
    {
     "cell_type": "code",
     "collapsed": false,
     "input": [
      "print re.sub(\n",
      "    r\"(?P<name>\\w)\\s*=\\s*(?P<val>(?:\\d+)|(?:\\S+))\",\n",
      "    r\"'\\g<name>': '\\g<val>'\",\n",
      "    \"x  = asd\"\n",
      ")"
     ],
     "language": "python",
     "metadata": {},
     "outputs": [
      {
       "output_type": "stream",
       "stream": "stdout",
       "text": [
        "'x': 'asd'\n"
       ]
      }
     ],
     "prompt_number": 21
    }
   ],
   "metadata": {}
  }
 ]
}