Markovify Twitter Reply Bot

#!/usr/bin/env python
import tweepy
import markovify
from twitter_credentials import ACCESS_TOKEN, ACCESS_TOKEN_SECRET, CONSUMER_SECRET, CONSUMER_KEY

auth = tweepy.OAuthHandler(CONSUMER_KEY, CONSUMER_SECRET)
auth.set_access_token(ACCESS_TOKEN, ACCESS_TOKEN_SECRET)
api = tweepy.API(auth)

with open("corpus.txt") as corpus:
    corpus_lines = corpus.read()
text_model = markovify.Text(corpus_lines)
message = text_model.make_short_sentence(140)
twt = api.search(q="#Ancient", since_id=3600)

for s in twt:
    sn = s.user.screen_name
    m = message, (sn)
    s = api.update_status(m, s.id)