twitterdiff.py

import json
from twitter import *

#  Twitter app credentials
token = "..."
token_secret = "..."
consumer_key = "..."
consumer_secret = "..."

# Twitter client
t = Twitter(auth=OAuth(token, token_secret, consumer_key, consumer_secret))


def save_list(data):
    formatted = {"ids": data}
    with open('/home/gifs/twitterdiff/twitter-followers.json', 'w') as f:
        json.dump(formatted, f, ensure_ascii=False)

def diff(first, second):
        missing_followers = set(first) - set(second)
        new_followers = set(second) - set(first)
        ids = {'new': list(new_followers), 'missing': list(missing_followers)}
        return ids

def screen_names(user_ids):
    # Fetch the screennames
    users = t.users.lookup(user_id=','.join(map(str, user_ids)))
    screen_names = ["@{}".format(user['screen_name']) for user in users]
    # Join the list of screennames as "@bill, @jenny and @joe unfollowed you"
    sn_list = ", ".join(screen_names[:-2] + [" and ".join(screen_names[-2:])])
    return sn_list

# Load previous list from JSON file
previous_follower_ids = json.load(open('/home/gifs/twitterdiff/twitter-followers.json'))['ids']

# Fetch updated follower list from the API
current_follower_ids = t.followers.ids()['ids']

# # Compare previous followers with current followers
results = diff(previous_follower_ids, current_follower_ids)
if results['missing']:

    try:
        unfollows = screen_names(results['missing'])
        t.direct_messages.new(
            user="@roach",
            text="{} unfollowed you.".format(unfollows))
    except:
        print "API Error"

save_list(current_follower_ids)