Get list member usernames for a given list

gistfile1.py

import json
import urllib2
import urllib

class ListMemeberParser():
    """
    Given a twitter username and list slug, return the members of that list.
    """

    def __init__(self, twitter_name, list_slug):
        self.twitter_name = twitter_name
        self.list_slug = list_slug
        self.url_base = """https://api.twitter.com/1/lists/members.json?"""
        self.url_query = {
            'slug' : list_slug,
            'owner_screen_name' : twitter_name,
        }
        self.cursor = '-1'
        self.users = []
        
    def __iter__(self):
        return self
    
    def next(self):
        if not self.users:
            self.parse_page()
        if not int(self.cursor):
            raise StopIteration
        return self.users.pop()['screen_name']

    def make_url(self):
        self.url_query['cursor'] = self.cursor
        return "%s%s" % (self.url_base, urllib.urlencode(self.url_query))
    
    def parse_page(self):
        url = self.make_url()
        req = urllib2.urlopen(url)
        page = json.loads(req.read())
        self.cursor = page['next_cursor_str']
        self.users = page['users']
    


for user in ListMemeberParser('tweetminster', 'ukmps'):
    print user