Module documentation

BeautifulSoup

The module Beautiful Soup is a Python HTML/XML parser designed for quick turnaround projects like screen-scraping. An example to find all the links in a page 

   1 import urllib
   2 import BeautifulSoup
   3 
   4 html = urllib.urlopen('http://vmspython.dyndns.org').read()
   5 
   6 s = BeautifulSoup.BeautifulSoup()
   7 s.feed(html)
   8 
   9 for i in  s('a'):
  10     try:
  11         print i['href']
  12     except:
  13         pass

PyAMF

The module PyAMF provides Action Message Format (AMF) support for Python that is compatible with the Flash Player.
A demo can be seen at http://vmspython.dyndns.org/anonymous/demo/demo2.htm

PycURL

PycURL is a Python module interface to the cURL library. PycURL can be used to fetch objects identified by an URL within a Python program. 

   1 import sys
   2 import pycurl
   3 
   4 class Test:
   5     def __init__(self):
   6         self.contents = ''
   7 
   8     def body_callback(self, buf):
   9         self.contents = self.contents + buf
  10 
  11 print >>sys.stderr, 'Testing', pycurl.version
  12 
  13 t = Test()
  14 c = pycurl.Curl()
  15 c.setopt(c.URL, 'http://vmspython.dyndns.org/')
  16 c.setopt(c.WRITEFUNCTION, t.body_callback)
  17 c.perform()
  18 c.close()
  19 
  20 print t.contents

dateutil

The dateutil module provides powerful extensions to the standard datetime module, available in Python 2.3+. 

   1 from dateutil.relativedelta import *
   2 from dateutil.easter import *
   3 from dateutil.rrule import *
   4 from dateutil.parser import *
   5 from datetime import *
   6 import commands
   7 import os
   8 now = parse(commands.getoutput("date"))
   9 today = now.date()
  10 year = rrule(YEARLY,bymonth=8,bymonthday=13,byweekday=FR)[0].year
  11 rdelta = relativedelta(easter(year), today)
  12 print "Today is:", today
  13 print "Year with next Aug 13th on a Friday is:", year
  14 print "How far is the Easter of that year:", rdelta
  15 print "And the Easter of that year is:", today+rdelta

ElementTree

The ElementTree wrapper type adds code to load XML files as trees of Element objects, and save them back again. 

   1 from elementtree.ElementTree import Element
   2 
   3 elem = Element("tag", first="1", second="2")
   4 
   5 # print 'first' attribute
   6 print elem.attrib.get("first")
   7 
   8 # same, using shortcut
   9 print elem.get("first")
  10 
  11 # print list of keys (using shortcuts)
  12 print elem.keys()
  13 print elem.items()
  14 
  15 # the 'third' attribute doesn't exist
  16 print elem.get("third")
  17 print elem.get("third", "default")
  18 
  19 # add the attribute and try again
  20 elem.set("third", "3")
  21 print elem.get("third", "default")

PIL

The Python Imaging Library handles images.

The following code creates JPEG Thumbnails 

   1 import os, sys
   2 import Image
   3 
   4 size = 128, 128
   5 
   6 for infile in sys.argv[1:]:
   7     outfile = os.path.splitext(infile)[0] + ".thumbnail"
   8     if infile != outfile:
   9         try:
  10             im = Image.open(infile)
  11             im.thumbnail(size)
  12             im.save(outfile, "JPEG")
  13         except IOError:
  14             print "cannot create thumbnail for", infile

SwishE

The module Swish-e Simple Web Indexing System for Humans - Enhanced

Example from http://jibe.freeshell.org/bits/SwishE/ 

# load the module
import SwishE
# get a SWISH-E handle on 't/swish.idx'
handle = SwishE.new('t/swish.idx')
# get a search object
search = handle.search('')
# search for 'madrid'
results = search.execute('madrid')
# tell the world how many results we have
print results.hits()
# iterate on the results
for r in results:
 ...    print r.getproperty('swishtitle')
 ... 
 Argentina Centro de Medios Independientes
 Indymedia Barcelona: home
 San Francisco Bay Area Independent Media Center
 Independent Media Center -
# now looking for 'lluita', we want to sort by title
search.setSort('swishtitle')
again = search.execute('lluita')
for r in again:
 ...    print r.getproperty('swishdocpath')
 ... 
 1.html

MySQLdb

The module MySQLdb offers a Python interface for Mysql 

import MySQLdb, pprint

connectionObject = MySQLdb.connect(host='172.17.2.1', user='toto', passwd='123', db='mycollection')

c = connectionObject.cursor()

nom_auteur = "'Shakespeare'"

c.execute(""" SELECT title, description FROM books WHERE author = %s """ % (nom_auteur,))

pprint.pprint(c.fetchall())

c.query("update books set title='toto' where author='titi'")

connectionObject.commit()
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