Download all images in a category on Wikimedia Commons. Requires pywikipedia

dlcat.py

#!/usr/bin/python
# -*- coding: utf-8  -*-
# -cat:Images_from_Wiki_Loves_Monuments

import sys, os
# Set your path to pywikipedia here
sys.path.append("/Users/hay/htdocs/checkouts/pywikipedia/")
import wikipedia, config, pagegenerators
import urllib2, codecs
 
def downloadFile(imagepage, target):

    html = imagepage.getImagePageHtml()
    fileUrl = imagepage.fileUrl()
    filename = target + imagepage.titleWithoutNamespace()
    
    if os.path.exists(target):
        print "Target exists: " + filename
    else:
        print "Downloading " + filename
        # Download the image
        uo = wikipedia.MyURLopener
        remotefile = uo.open(fileUrl)
        # Store the image
        localfile = open(filename, "wb")
        localfile.write(remotefile.read())
        localfile.close() 
        # Store the html    
        localhtmlfile = codecs.open(filename + u'.html', 'wb', 'utf-8')
        localhtmlfile.write(html)
        localhtmlfile.close()
        print "Done!"

    return

def main():
    wikipedia.setSite(wikipedia.getSite(u'commons', u'commons'))

    generator = None
    genFactory = pagegenerators.GeneratorFactory()

    for arg in wikipedia.handleArgs():
        if arg.startswith('-target:'):
            target = arg [len('-target:'):]
        else:
            genFactory.handleArg(arg)

    generator = genFactory.getCombinedGenerator()

    if generator:
	# Get a preloading generator with only images
	pgenerator = pagegenerators.PreloadingGenerator(pagegenerators.NamespaceFilterPageGenerator(generator, [6]))
	for page in pgenerator:
	    imagepage = wikipedia.ImagePage(page.site(), page.title())
	    downloadFile(imagepage, target)

if __name__ == "__main__":
    try:
        main()
    finally:
        wikipedia.stopme()