I don't put photos on Flickr with a view to selling them. Many photos i couldn't sell because of copyright issues or existing licensing deals.

But a bit like bloggers using google adsense on a personal blog, it wouldn't hurt to get a bit of extra pocket money should someone wish to buy a license to use a photo i already took.

I already upload everything in hi-res, i title, caption and keyword the images. It's all ready to go.

 # get the list of photos from flickr
def get_flickr_photos(self):
    flickr = flickrapi.FlickrAPI(self.flickr_api_key, format='etree')
    photos = flickr.photos_search(user_id=self.flickr_user_id, per_page='50') # comes out as the _ElementInterface
    # parse out the XML and return an array of URLs
    # http://farm{farm-id}.static.flickr.com/{server-id}/{id}_{secret}_[mstb].jpg
    urls = []
    for image in photos.getchildren()[0]:
        img = {}
        src = 'http://farm%s.static.flickr.com/%s/%s_%s_m.jpg' %  (image.attrib['farm'], image.attrib['server'], image.attrib['id'], image.attrib['secret'])
        url = 'http://www.flickr.com/photos/%s/%s/' % (self.flickr_user_id, image.attrib['id'])
        img['src'] = src
        img['title'] = image.attrib['title']
        img['url'] = url
        urls.append(img)
    return urls