CHAPTER 11.ipynb

{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# CHAPTER 11 - REGULAR EXPRESSIONS"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "From: stephen.marquard@uct.ac.za\n",
      "From: louis@media.berkeley.edu\n",
      "From: zqian@umich.edu\n",
      "From: rjlowe@iupui.edu\n",
      "From: zqian@umich.edu\n",
      "From: rjlowe@iupui.edu\n",
      "From: cwen@iupui.edu\n",
      "From: cwen@iupui.edu\n",
      "From: gsilver@umich.edu\n",
      "From: gsilver@umich.edu\n",
      "From: zqian@umich.edu\n",
      "From: gsilver@umich.edu\n",
      "From: wagnermr@iupui.edu\n",
      "From: zqian@umich.edu\n",
      "From: antranig@caret.cam.ac.uk\n",
      "From: gopal.ramasammycook@gmail.com\n",
      "From: david.horwitz@uct.ac.za\n",
      "From: david.horwitz@uct.ac.za\n",
      "From: david.horwitz@uct.ac.za\n",
      "From: david.horwitz@uct.ac.za\n",
      "From: stephen.marquard@uct.ac.za\n",
      "From: louis@media.berkeley.edu\n",
      "From: louis@media.berkeley.edu\n",
      "From: ray@media.berkeley.edu\n",
      "From: cwen@iupui.edu\n",
      "From: cwen@iupui.edu\n",
      "From: cwen@iupui.edu\n"
     ]
    }
   ],
   "source": [
    "# Search for lines that contain 'From'\n",
    "import re\n",
    "hand = open('mbox-short.txt')\n",
    "for line in hand:\n",
    "    line = line.rstrip()\n",
    "    if re.search('From:', line):\n",
    "        print(line)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "From: stephen.marquard@uct.ac.za\n",
      "From: louis@media.berkeley.edu\n",
      "From: zqian@umich.edu\n",
      "From: rjlowe@iupui.edu\n",
      "From: zqian@umich.edu\n",
      "From: rjlowe@iupui.edu\n",
      "From: cwen@iupui.edu\n",
      "From: cwen@iupui.edu\n",
      "From: gsilver@umich.edu\n",
      "From: gsilver@umich.edu\n",
      "From: zqian@umich.edu\n",
      "From: gsilver@umich.edu\n",
      "From: wagnermr@iupui.edu\n",
      "From: zqian@umich.edu\n",
      "From: antranig@caret.cam.ac.uk\n",
      "From: gopal.ramasammycook@gmail.com\n",
      "From: david.horwitz@uct.ac.za\n",
      "From: david.horwitz@uct.ac.za\n",
      "From: david.horwitz@uct.ac.za\n",
      "From: david.horwitz@uct.ac.za\n",
      "From: stephen.marquard@uct.ac.za\n",
      "From: louis@media.berkeley.edu\n",
      "From: louis@media.berkeley.edu\n",
      "From: ray@media.berkeley.edu\n",
      "From: cwen@iupui.edu\n",
      "From: cwen@iupui.edu\n",
      "From: cwen@iupui.edu\n"
     ]
    }
   ],
   "source": [
    "# Search for lines that start with 'From'\n",
    "import re\n",
    "hand = open('mbox-short.txt')\n",
    "for line in hand:\n",
    "    line = line.rstrip()\n",
    "    if re.search('^From:', line):\n",
    "        print(line)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 11.1 Character matching in regular expressions"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "From: stephen.marquard@uct.ac.za\n",
      "From: louis@media.berkeley.edu\n",
      "From: zqian@umich.edu\n",
      "From: rjlowe@iupui.edu\n",
      "From: zqian@umich.edu\n",
      "From: rjlowe@iupui.edu\n",
      "From: cwen@iupui.edu\n",
      "From: cwen@iupui.edu\n",
      "From: gsilver@umich.edu\n",
      "From: gsilver@umich.edu\n",
      "From: zqian@umich.edu\n",
      "From: gsilver@umich.edu\n",
      "From: wagnermr@iupui.edu\n",
      "From: zqian@umich.edu\n",
      "From: antranig@caret.cam.ac.uk\n",
      "From: gopal.ramasammycook@gmail.com\n",
      "From: david.horwitz@uct.ac.za\n",
      "From: david.horwitz@uct.ac.za\n",
      "From: david.horwitz@uct.ac.za\n",
      "From: david.horwitz@uct.ac.za\n",
      "From: stephen.marquard@uct.ac.za\n",
      "From: louis@media.berkeley.edu\n",
      "From: louis@media.berkeley.edu\n",
      "From: ray@media.berkeley.edu\n",
      "From: cwen@iupui.edu\n",
      "From: cwen@iupui.edu\n",
      "From: cwen@iupui.edu\n"
     ]
    }
   ],
   "source": [
    "# Search for lines that start with 'F', followed by\n",
    "# 2 characters, followed by 'm:'\n",
    "import re\n",
    "hand = open('mbox-short.txt')\n",
    "for line in hand:\n",
    "    line = line.rstrip()\n",
    "    if re.search('^F..m:', line):\n",
    "        print(line)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "From: stephen.marquard@uct.ac.za\n",
      "From: louis@media.berkeley.edu\n",
      "From: zqian@umich.edu\n",
      "From: rjlowe@iupui.edu\n",
      "From: zqian@umich.edu\n",
      "From: rjlowe@iupui.edu\n",
      "From: cwen@iupui.edu\n",
      "From: cwen@iupui.edu\n",
      "From: gsilver@umich.edu\n",
      "From: gsilver@umich.edu\n",
      "From: zqian@umich.edu\n",
      "From: gsilver@umich.edu\n",
      "From: wagnermr@iupui.edu\n",
      "From: zqian@umich.edu\n",
      "From: antranig@caret.cam.ac.uk\n",
      "From: gopal.ramasammycook@gmail.com\n",
      "From: david.horwitz@uct.ac.za\n",
      "From: david.horwitz@uct.ac.za\n",
      "From: david.horwitz@uct.ac.za\n",
      "From: david.horwitz@uct.ac.za\n",
      "From: stephen.marquard@uct.ac.za\n",
      "From: louis@media.berkeley.edu\n",
      "From: louis@media.berkeley.edu\n",
      "From: ray@media.berkeley.edu\n",
      "From: cwen@iupui.edu\n",
      "From: cwen@iupui.edu\n",
      "From: cwen@iupui.edu\n"
     ]
    }
   ],
   "source": [
    "# Search for lines that start with From and have an at sign\n",
    "import re\n",
    "hand = open('mbox-short.txt')\n",
    "for line in hand:\n",
    "    line = line.rstrip()\n",
    "    if re.search('^From:.+@', line):\n",
    "        print(line)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 11.2 Extracting data using regular expressions"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "['csev@umich.edu', 'cwen@iupui.edu']\n"
     ]
    }
   ],
   "source": [
    "import re\n",
    "s = 'A message from csev@umich.edu to cwen@iupui.edu about meeting @2PM'\n",
    "lst = re.findall('\\S+@\\S+', s)\n",
    "print(lst)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "['stephen.marquard@uct.ac.za']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801051412.m05ECIaH010327@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['stephen.marquard@uct.ac.za']\n",
      "['source@collab.sakaiproject.org']\n",
      "['stephen.marquard@uct.ac.za']\n",
      "['stephen.marquard@uct.ac.za']\n",
      "['louis@media.berkeley.edu']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801042308.m04N8v6O008125@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['louis@media.berkeley.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['louis@media.berkeley.edu']\n",
      "['louis@media.berkeley.edu']\n",
      "['zqian@umich.edu']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801042109.m04L92hb007923@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['zqian@umich.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['zqian@umich.edu']\n",
      "['zqian@umich.edu']\n",
      "['rjlowe@iupui.edu']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801042044.m04Kiem3007881@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['rjlowe@iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['rjlowe@iupui.edu']\n",
      "['rjlowe@iupui.edu']\n",
      "['zqian@umich.edu']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801042001.m04K1cO0007738@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['zqian@umich.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['zqian@umich.edu']\n",
      "['zqian@umich.edu']\n",
      "['zqian@umich.edu']\n",
      "['rjlowe@iupui.edu']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801041948.m04JmdwO007705@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['rjlowe@iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['rjlowe@iupui.edu']\n",
      "['rjlowe@iupui.edu']\n",
      "['cwen@iupui.edu']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801041635.m04GZQGZ007313@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['cwen@iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['cwen@iupui.edu']\n",
      "['cwen@iupui.edu']\n",
      "['hu2@iupui.edu']\n",
      "['cwen@iupui.edu']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801041633.m04GX6eG007292@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['cwen@iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['cwen@iupui.edu']\n",
      "['cwen@iupui.edu']\n",
      "['hu2@iupui.edu']\n",
      "['gsilver@umich.edu']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801041611.m04GB1Lb007221@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['gsilver@umich.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['gsilver@umich.edu']\n",
      "['gsilver@umich.edu']\n",
      "['gsilver@umich.edu']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801041610.m04GA5KP007209@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['gsilver@umich.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['gsilver@umich.edu']\n",
      "['gsilver@umich.edu']\n",
      "['zqian@umich.edu']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801041609.m04G9EuX007197@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['zqian@umich.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['zqian@umich.edu']\n",
      "['zqian@umich.edu']\n",
      "['gsilver@umich.edu']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801041608.m04G8d7w007184@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['gsilver@umich.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['gsilver@umich.edu']\n",
      "['gsilver@umich.edu']\n",
      "['wagnermr@iupui.edu']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801041537.m04Fb6Ci007092@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['wagnermr@iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['wagnermr@iupui.edu']\n",
      "['wagnermr@iupui.edu']\n",
      "['zqian@umich.edu']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801041515.m04FFv42007050@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['zqian@umich.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['zqian@umich.edu']\n",
      "['zqian@umich.edu']\n",
      "['antranig@caret.cam.ac.uk']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801041502.m04F21Jo007031@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['antranig@caret.cam.ac.uk']\n",
      "['source@collab.sakaiproject.org']\n",
      "['antranig@caret.cam.ac.uk']\n",
      "['antranig@caret.cam.ac.uk']\n",
      "['gopal.ramasammycook@gmail.com']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801041403.m04E3psW006926@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['gopal.ramasammycook@gmail.com']\n",
      "['source@collab.sakaiproject.org']\n",
      "['gopal.ramasammycook@gmail.com']\n",
      "['gopal.ramasammycook@gmail.com']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801041200.m04C0gfK006793@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['source@collab.sakaiproject.org']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['dhorwitz@david-horwitz-6:~/branchManagemnt/sakai_2-5-x>']\n",
      "['dhorwitz@david-horwitz-6:~/branchManagemnt/sakai_2-5-x>']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801041106.m04B6lK3006677@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['source@collab.sakaiproject.org']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801040947.m049lUxo006517@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['source@collab.sakaiproject.org']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['josrodri@iupui.edu']\n",
      "['dhorwitz@david-horwitz-6:~/branchManagemnt/sakai_2-5-x>']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801040932.m049W2i5006493@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['source@collab.sakaiproject.org']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['josrodri@iupui.edu']\n",
      "['dhorwitz@david-horwitz-6:~/branchManagemnt/sakai_2-5-x>']\n",
      "['stephen.marquard@uct.ac.za']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801040905.m0495rWB006420@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['stephen.marquard@uct.ac.za']\n",
      "['source@collab.sakaiproject.org']\n",
      "['stephen.marquard@uct.ac.za']\n",
      "['stephen.marquard@uct.ac.za']\n",
      "['louis@media.berkeley.edu']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801040023.m040NpCc005473@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['louis@media.berkeley.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['louis@media.berkeley.edu']\n",
      "['louis@media.berkeley.edu']\n",
      "['louis@media.berkeley.edu']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801032216.m03MGhDa005292@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['louis@media.berkeley.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['louis@media.berkeley.edu']\n",
      "['louis@media.berkeley.edu']\n",
      "['ray@media.berkeley.edu']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801032205.m03M5Ea7005273@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['ray@media.berkeley.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['ray@media.berkeley.edu']\n",
      "['ray@media.berkeley.edu']\n",
      "['cwen@iupui.edu']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801032133.m03LX3gG005191@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['cwen@iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['cwen@iupui.edu']\n",
      "['cwen@iupui.edu']\n",
      "['cwen@iupui.edu']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801032127.m03LRUqH005177@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['cwen@iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['cwen@iupui.edu']\n",
      "['cwen@iupui.edu']\n",
      "['wagnermr@iupui.edu']\n",
      "['cwen@iupui.edu']\n",
      "['<postmaster@collab.sakaiproject.org>']\n",
      "['<200801032122.m03LMFo4005148@nakamura.uits.iupui.edu>']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['<source@collab.sakaiproject.org>;']\n",
      "['apache@localhost)']\n",
      "['source@collab.sakaiproject.org;']\n",
      "['cwen@iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['cwen@iupui.edu']\n",
      "['cwen@iupui.edu']\n",
      "['wagnermr@iupui.edu']\n"
     ]
    }
   ],
   "source": [
    "# Search for lines that have an at sign between characters\n",
    "import re\n",
    "hand = open('mbox-short.txt')\n",
    "for line in hand:\n",
    "    line = line.rstrip()\n",
    "    x = re.findall('\\S+@\\S+', line)\n",
    "    if len(x) > 0:\n",
    "        print(x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "['stephen.marquard@uct.ac.za']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801051412.m05ECIaH010327@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['stephen.marquard@uct.ac.za']\n",
      "['source@collab.sakaiproject.org']\n",
      "['stephen.marquard@uct.ac.za']\n",
      "['stephen.marquard@uct.ac.za']\n",
      "['louis@media.berkeley.edu']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801042308.m04N8v6O008125@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['louis@media.berkeley.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['louis@media.berkeley.edu']\n",
      "['louis@media.berkeley.edu']\n",
      "['zqian@umich.edu']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801042109.m04L92hb007923@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['zqian@umich.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['zqian@umich.edu']\n",
      "['zqian@umich.edu']\n",
      "['rjlowe@iupui.edu']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801042044.m04Kiem3007881@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['rjlowe@iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['rjlowe@iupui.edu']\n",
      "['rjlowe@iupui.edu']\n",
      "['zqian@umich.edu']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801042001.m04K1cO0007738@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['zqian@umich.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['zqian@umich.edu']\n",
      "['zqian@umich.edu']\n",
      "['zqian@umich.edu']\n",
      "['rjlowe@iupui.edu']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801041948.m04JmdwO007705@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['rjlowe@iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['rjlowe@iupui.edu']\n",
      "['rjlowe@iupui.edu']\n",
      "['cwen@iupui.edu']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801041635.m04GZQGZ007313@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['cwen@iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['cwen@iupui.edu']\n",
      "['cwen@iupui.edu']\n",
      "['hu2@iupui.edu']\n",
      "['cwen@iupui.edu']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801041633.m04GX6eG007292@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['cwen@iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['cwen@iupui.edu']\n",
      "['cwen@iupui.edu']\n",
      "['hu2@iupui.edu']\n",
      "['gsilver@umich.edu']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801041611.m04GB1Lb007221@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['gsilver@umich.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['gsilver@umich.edu']\n",
      "['gsilver@umich.edu']\n",
      "['gsilver@umich.edu']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801041610.m04GA5KP007209@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['gsilver@umich.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['gsilver@umich.edu']\n",
      "['gsilver@umich.edu']\n",
      "['zqian@umich.edu']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801041609.m04G9EuX007197@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['zqian@umich.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['zqian@umich.edu']\n",
      "['zqian@umich.edu']\n",
      "['gsilver@umich.edu']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801041608.m04G8d7w007184@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['gsilver@umich.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['gsilver@umich.edu']\n",
      "['gsilver@umich.edu']\n",
      "['wagnermr@iupui.edu']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801041537.m04Fb6Ci007092@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['wagnermr@iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['wagnermr@iupui.edu']\n",
      "['wagnermr@iupui.edu']\n",
      "['zqian@umich.edu']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801041515.m04FFv42007050@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['zqian@umich.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['zqian@umich.edu']\n",
      "['zqian@umich.edu']\n",
      "['antranig@caret.cam.ac.uk']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801041502.m04F21Jo007031@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['antranig@caret.cam.ac.uk']\n",
      "['source@collab.sakaiproject.org']\n",
      "['antranig@caret.cam.ac.uk']\n",
      "['antranig@caret.cam.ac.uk']\n",
      "['gopal.ramasammycook@gmail.com']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801041403.m04E3psW006926@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['gopal.ramasammycook@gmail.com']\n",
      "['source@collab.sakaiproject.org']\n",
      "['gopal.ramasammycook@gmail.com']\n",
      "['gopal.ramasammycook@gmail.com']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801041200.m04C0gfK006793@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['source@collab.sakaiproject.org']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['dhorwitz@david-horwitz-6:~/branchManagemnt/sakai_2-5-x']\n",
      "['dhorwitz@david-horwitz-6:~/branchManagemnt/sakai_2-5-x']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801041106.m04B6lK3006677@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['source@collab.sakaiproject.org']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801040947.m049lUxo006517@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['source@collab.sakaiproject.org']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['josrodri@iupui.edu']\n",
      "['dhorwitz@david-horwitz-6:~/branchManagemnt/sakai_2-5-x']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801040932.m049W2i5006493@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['source@collab.sakaiproject.org']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['david.horwitz@uct.ac.za']\n",
      "['josrodri@iupui.edu']\n",
      "['dhorwitz@david-horwitz-6:~/branchManagemnt/sakai_2-5-x']\n",
      "['stephen.marquard@uct.ac.za']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801040905.m0495rWB006420@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['stephen.marquard@uct.ac.za']\n",
      "['source@collab.sakaiproject.org']\n",
      "['stephen.marquard@uct.ac.za']\n",
      "['stephen.marquard@uct.ac.za']\n",
      "['louis@media.berkeley.edu']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801040023.m040NpCc005473@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['louis@media.berkeley.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['louis@media.berkeley.edu']\n",
      "['louis@media.berkeley.edu']\n",
      "['louis@media.berkeley.edu']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801032216.m03MGhDa005292@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['louis@media.berkeley.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['louis@media.berkeley.edu']\n",
      "['louis@media.berkeley.edu']\n",
      "['ray@media.berkeley.edu']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801032205.m03M5Ea7005273@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['ray@media.berkeley.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['ray@media.berkeley.edu']\n",
      "['ray@media.berkeley.edu']\n",
      "['cwen@iupui.edu']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801032133.m03LX3gG005191@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['cwen@iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['cwen@iupui.edu']\n",
      "['cwen@iupui.edu']\n",
      "['cwen@iupui.edu']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801032127.m03LRUqH005177@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['cwen@iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['cwen@iupui.edu']\n",
      "['cwen@iupui.edu']\n",
      "['wagnermr@iupui.edu']\n",
      "['cwen@iupui.edu']\n",
      "['postmaster@collab.sakaiproject.org']\n",
      "['200801032122.m03LMFo4005148@nakamura.uits.iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['source@collab.sakaiproject.org']\n",
      "['apache@localhost']\n",
      "['source@collab.sakaiproject.org']\n",
      "['cwen@iupui.edu']\n",
      "['source@collab.sakaiproject.org']\n",
      "['cwen@iupui.edu']\n",
      "['cwen@iupui.edu']\n",
      "['wagnermr@iupui.edu']\n"
     ]
    }
   ],
   "source": [
    "# Search for lines that have an at sign between characters\n",
    "# The characters must be a letter or number\n",
    "import re\n",
    "hand = open('mbox-short.txt')\n",
    "for line in hand:\n",
    "    line = line.rstrip()\n",
    "    x = re.findall('[a-zA-Z0-9]\\S+@\\S+[a-zA-Z]', line)\n",
    "    if len(x) > 0:\n",
    "        print(x)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 11.3 Combining searching and extracting"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 8,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "X-DSPAM-Confidence: 0.8475\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.6178\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.6961\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.7565\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.7626\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.7556\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.7002\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.7615\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.7601\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.7605\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.6959\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.7606\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.7559\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.7605\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.6932\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.7558\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.6526\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.6948\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.6528\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.7002\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.7554\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.6956\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.6959\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.7556\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.9846\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.8509\n",
      "X-DSPAM-Probability: 0.0000\n",
      "X-DSPAM-Confidence: 0.9907\n",
      "X-DSPAM-Probability: 0.0000\n"
     ]
    }
   ],
   "source": [
    "# Search for lines that start with 'X' followed by any non\n",
    "# whitespace characters and ':'\n",
    "# followed by a space and any number.\n",
    "# The number can include a decimal.\n",
    "import re\n",
    "hand = open('mbox-short.txt')\n",
    "for line in hand:\n",
    "    line = line.rstrip()\n",
    "    if re.search('^X\\S*: [0-9.]+', line):\n",
    "        print(line)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "['0.8475']\n",
      "['0.0000']\n",
      "['0.6178']\n",
      "['0.0000']\n",
      "['0.6961']\n",
      "['0.0000']\n",
      "['0.7565']\n",
      "['0.0000']\n",
      "['0.7626']\n",
      "['0.0000']\n",
      "['0.7556']\n",
      "['0.0000']\n",
      "['0.7002']\n",
      "['0.0000']\n",
      "['0.7615']\n",
      "['0.0000']\n",
      "['0.7601']\n",
      "['0.0000']\n",
      "['0.7605']\n",
      "['0.0000']\n",
      "['0.6959']\n",
      "['0.0000']\n",
      "['0.7606']\n",
      "['0.0000']\n",
      "['0.7559']\n",
      "['0.0000']\n",
      "['0.7605']\n",
      "['0.0000']\n",
      "['0.6932']\n",
      "['0.0000']\n",
      "['0.7558']\n",
      "['0.0000']\n",
      "['0.6526']\n",
      "['0.0000']\n",
      "['0.6948']\n",
      "['0.0000']\n",
      "['0.6528']\n",
      "['0.0000']\n",
      "['0.7002']\n",
      "['0.0000']\n",
      "['0.7554']\n",
      "['0.0000']\n",
      "['0.6956']\n",
      "['0.0000']\n",
      "['0.6959']\n",
      "['0.0000']\n",
      "['0.7556']\n",
      "['0.0000']\n",
      "['0.9846']\n",
      "['0.0000']\n",
      "['0.8509']\n",
      "['0.0000']\n",
      "['0.9907']\n",
      "['0.0000']\n"
     ]
    }
   ],
   "source": [
    "# Search for lines that start with 'X' followed by any\n",
    "# non whitespace characters and ':' followed by a space\n",
    "# and any number. The number can include a decimal.\n",
    "# Then print the number if it is greater than zero.\n",
    "import re\n",
    "hand = open('mbox-short.txt')\n",
    "for line in hand:\n",
    "    line = line.rstrip()\n",
    "    x = re.findall('^X\\S*: ([0-9.]+)', line)\n",
    "    if len(x) > 0:\n",
    "        print(x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 10,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "['39772']\n",
      "['39771']\n",
      "['39770']\n",
      "['39769']\n",
      "['39766']\n",
      "['39765']\n",
      "['39764']\n",
      "['39763']\n",
      "['39762']\n",
      "['39761']\n",
      "['39760']\n",
      "['39759']\n",
      "['39758']\n",
      "['39757']\n",
      "['39756']\n",
      "['39755']\n",
      "['39754']\n",
      "['39753']\n",
      "['39752']\n",
      "['39751']\n",
      "['39750']\n",
      "['39749']\n",
      "['39746']\n",
      "['39745']\n",
      "['39744']\n",
      "['39743']\n",
      "['39742']\n"
     ]
    }
   ],
   "source": [
    "# Search for lines that start with 'Details: rev='\n",
    "# followed by numbers and '.'\n",
    "# Then print the number if it is greater than zero\n",
    "import re\n",
    "hand = open('mbox-short.txt')\n",
    "for line in hand:\n",
    "    line = line.rstrip()\n",
    "    x = re.findall('^Details:.*rev=([0-9.]+)', line)\n",
    "    if len(x) > 0:\n",
    "        print(x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "['09']\n",
      "['18']\n",
      "['16']\n",
      "['15']\n",
      "['15']\n",
      "['14']\n",
      "['11']\n",
      "['11']\n",
      "['11']\n",
      "['11']\n",
      "['11']\n",
      "['11']\n",
      "['10']\n",
      "['10']\n",
      "['10']\n",
      "['09']\n",
      "['07']\n",
      "['06']\n",
      "['04']\n",
      "['04']\n",
      "['04']\n",
      "['19']\n",
      "['17']\n",
      "['17']\n",
      "['16']\n",
      "['16']\n",
      "['16']\n"
     ]
    }
   ],
   "source": [
    "# Search for lines that start with From and a character\n",
    "# followed by a two digit number between 00 and 99 followed by ':'\n",
    "# Then print the number if it is greater than zero\n",
    "import re\n",
    "hand = open('mbox-short.txt')\n",
    "for line in hand:\n",
    "    line = line.rstrip()\n",
    "    x = re.findall('^From .* ([0-9][0-9]):', line)\n",
    "    if len(x) > 0:\n",
    "        print(x)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "### 11.4 Escape character"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 12,
   "metadata": {},
   "outputs": [],
   "source": [
    "import re\n",
    "x = 'We just received $10.00 for cookies.'\n",
    "y = re.findall('\\$[0-9.]+',x)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 13,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['$10.00']"
      ]
     },
     "execution_count": 13,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "y"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 14,
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "['A',\n",
       " 'ASCII',\n",
       " 'DEBUG',\n",
       " 'DOTALL',\n",
       " 'I',\n",
       " 'IGNORECASE',\n",
       " 'L',\n",
       " 'LOCALE',\n",
       " 'M',\n",
       " 'MULTILINE',\n",
       " 'Match',\n",
       " 'Pattern',\n",
       " 'RegexFlag',\n",
       " 'S',\n",
       " 'Scanner',\n",
       " 'T',\n",
       " 'TEMPLATE',\n",
       " 'U',\n",
       " 'UNICODE',\n",
       " 'VERBOSE',\n",
       " 'X',\n",
       " '_MAXCACHE',\n",
       " '__all__',\n",
       " '__builtins__',\n",
       " '__cached__',\n",
       " '__doc__',\n",
       " '__file__',\n",
       " '__loader__',\n",
       " '__name__',\n",
       " '__package__',\n",
       " '__spec__',\n",
       " '__version__',\n",
       " '_cache',\n",
       " '_compile',\n",
       " '_compile_repl',\n",
       " '_expand',\n",
       " '_locale',\n",
       " '_pickle',\n",
       " '_special_chars_map',\n",
       " '_subx',\n",
       " 'compile',\n",
       " 'copyreg',\n",
       " 'enum',\n",
       " 'error',\n",
       " 'escape',\n",
       " 'findall',\n",
       " 'finditer',\n",
       " 'fullmatch',\n",
       " 'functools',\n",
       " 'match',\n",
       " 'purge',\n",
       " 'search',\n",
       " 'split',\n",
       " 'sre_compile',\n",
       " 'sre_parse',\n",
       " 'sub',\n",
       " 'subn',\n",
       " 'template']"
      ]
     },
     "execution_count": 14,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "dir(re)"
   ]
  }
 ],
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