followersdiff.py

#!/usr/bin/env python

"""
Script finds all your followers and saves them to file. Re-running the script
will do a diff with that file so you can see who followed or unfollowed you 
since last time you ran the script.

Requires tweepy library
"""

import tweepy
import time
import sys
import os.path
from tweetutils import *

# settings
user = raw_input("enter username: ")
cachefile = "followers_cache.txt"

# authenticate using OAUTH
api = authenticate()

# download followers
print "updating followers for user [%s]..." % (user, )
followers = tweepy.Cursor(api.followers, id=user).items()
unames = [x.screen_name.lower() for x in followers]

if os.path.isfile(cachefile):
  
  # do a diff with the currently saved cached file of followers
  f = open(cachefile, 'r')
  oldunames = [x.strip() for x in f.readlines()]
  f.close()
  
  unow = set(unames)
  ubefore = set(oldunames)
  
  # people who follow user name but didnt before
  newfollows = unow - ubefore
  
  print '%d New followers: ' % (len(newfollows), )
  for x in newfollows: print x
  print '---------'  
  
  # people who followed user before but dont now
  unfollows = ubefore - unow
  
  print '%d People who unfollowed you: ' % (len(unfollows), )
  for x in unfollows: print x
  print '---------'
  
else:
  
  print "followers cache does not exist so nothing to compare to."

# ask user about what to do 
tosave = raw_input("Do you want to save followers to cache file [%s]? yes/no: " % (cachefile, ))
if tosave=="yes":

  # back up followers to file
  print "OK Saved followers to file [%s]" % (cachefile, )
  f = open(cachefile, 'w')
  f.writelines([x+'\n' for x in unames])
  f.close()
  
else:
  print "Answer != 'yes' so not saving a cache file. Bye!"