Selects a random image to use as a twitter icon

update_twitter_icon.py

import twitter
import glob
import fnmatch
import random
import os

TWITTER_ICON_GLOB = '*.png'
BLACKLIST_FILENAME = 'blacklist.txt'

CONSUMER_KEY=''
CONSUMER_SECRET=''
ACCESS_TOKEN_KEY=''
ACCESS_TOKEN_SECRET=''

def select_icon_image():
    icon_images = glob.glob(TWITTER_ICON_GLOB)

    blacklist = []
    if os.path.isfile(BLACKLIST_FILENAME):
        with open(BLACKLIST_FILENAME, 'r') as f:
            blacklist = list(f)
            blacklist = list(map(lambda filename: filename.rstrip('\n'), blacklist))

    match_blacklist = lambda filename: not any(filter(lambda pattern: fnmatch.fnmatch(filename, pattern), blacklist))
    icon_images = list(filter(match_blacklist, icon_images))

    return random.choice(icon_images)

def append_to_blacklist(icon_image):
    with open(BLACKLIST_FILENAME, 'a') as f:
        f.write(icon_image + '\n')

def upload_twitter_icon(icon_image):
    api = twitter.Api(consumer_key=CONSUMER_KEY,
                          consumer_secret=CONSUMER_SECRET,
                          access_token_key=ACCESS_TOKEN_KEY,
                          access_token_secret=ACCESS_TOKEN_SECRET)

    if api.VerifyCredentials():
        api.UpdateImage(icon_image)
        return True
    return False

icon_image = select_icon_image()
print("selected icon: %s" % icon_image)
if upload_twitter_icon(icon_image):
    append_to_blacklist(icon_image)
    print("uploaded icon: %s" % icon_image)