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do_twitter.py
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do_twitter.py
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# -*- coding: utf-8 -*-
from __future__ import division
"""
Program to monitor Twitter for people tweeting about their paper cuts
and optionally reply to them.
Uses http://code.google.com/p/python-twitter/
"""
import twitter, os, time, sys, re
# Our shared modules
import common, filters
import logging
logging.basicConfig(filename = common.LOG_FILE,
level = logging.INFO,
format = '%(asctime)s %(message)s')
def log_sys_err(msg):
"""Log serious errors with system exceptions"""
full_msg = '%s : %s' % (msg, str([sys.exc_info()[:2]]))
print full_msg
logging.error(full_msg)
time.sleep(1)
def A(user):
return '@%s' % user
def get_reply_message(user):
"""Our reply to people who have tweeted about their paper cuts"""
return '@%s Yes, paper cuts sure do hurt. I hope it gets better soon.' % user
def is_relevant(twitter_status):
"""We are looking for tweets that contain 'papercut'"""
message = filters.clean_text(twitter_status.text.encode('ascii', 'replace'))
return filters.is_papercut(message)
"""
We want a date/time format like
9:14pm for today
5:02pm Wed 29 Aug for past days
"""
from datetime import datetime
LOCAL_TIME_DELTA = datetime.now() - datetime.utcnow()
LOCAL_TIME_DELTA
SUMMARY_DAY_FORMAT = '%I:%M%p'
SUMMARY_TM_FORMAT = '%I:%M%p %a %d %b'
RE_TIME = re.compile(r'(\d+):(\d+)(AM|PM)', re.IGNORECASE)
def _same_day(dt1, dt2):
return dt1.year == dt2.year and dt1.month == dt2.month and dt1.day == dt2.day
def _time_replacer(m):
hr,min,ap = m.groups()
return '%d:%02d%s' % (int(hr),int(min),ap.lower())
def get_local_time_str(tm):
gmt = datetime(*time.localtime(tm)[:6])
gmt += LOCAL_TIME_DELTA
format = SUMMARY_DAY_FORMAT if _same_day(gmt, datetime.now()) else SUMMARY_TM_FORMAT
return RE_TIME.sub(_time_replacer, gmt.strftime(format))
class ScoredTweet:
"""A ScoredTweet contains information about a tweet and a score for that
tweet
Tweet info:
_id: unique id of tweet
_time: time of tweet
_user: user name of tweeter
_message: text of tweet
Score:
_replyable : True if we are really sure the tweeter had a
paper cut
_score: log(odds ratio) of tweet being positive
"""
def __init__(self, model, twitter_status):
# Decode the twitter_status
tm0 = time.strptime(twitter_status.created_at[:-6], '%a, %d %b %Y %H:%M:%S')
self._time = time.mktime(tm0)
self._user = twitter_status._user.screen_name
self._message = filters.clean_text(twitter_status.text.encode('ascii', 'replace'))
self._id = twitter_status._id
# Score the decoded status
if model:
positive, self._score = model.classify(self._message)
else:
positive, self._score = False, 0.0
self._replyable = positive and filters.is_allowed_for_replying(self._message)
def __repr__(self):
return '%-5s|%6.2f|%s"' % (self._replyable, self._score, self.get_tweet_line())
def get_tweet_line(self):
return filters.encode_tweet_line(self._id, self._time, self._user, self._message)
def get_scored_line(self):
return ' %-5s %6.2f %-15s : "%s"' % (self._replyable, self._score, A(self._user), self._message)
def load_replied_tweets():
"""Returns a list of (id,user) of the tweets already replied to
"""
replied_tweets = []
try:
fp = open( common.REPLIES_FILE, 'rt')
except IOError:
logging.error('Could not open %s', common.REPLIES_FILE)
return replied_tweets
try:
for line in fp:
line = line.rstrip('\n').strip()
if line:
id,_,user,_ = filters.decode_tweet_line(line)
replied_tweets.append((id, user))
finally:
fp.close()
return replied_tweets
def get_replied_users(replied_tweets):
"""Given the list of tweets replied to,
returns the set of users replied to in lower case
"""
return set(user.lower() for _,user in replied_tweets)
def fetch_latest_scored_tweets(api, model, latest_tweet_id):
"""Fetch some tweets containing 'paper cut' from
Twitter and return them as a list of ScoredTweets
"""
def search_twitter(pattern):
#try:
results = api.GetSearch(pattern, since_id = latest_tweet_id)
time.sleep(1)
return results
#except Exception:
log_sys_err(' Twitter api error for search "%s"' % pattern)
return []
results = search_twitter('paper cut') + search_twitter('papercut')
results = [r for r in results if is_relevant(r)]
return [ScoredTweet(model, r) for r in results]
def record_tweets(scored_tweets):
"""Store the ScoredTweets in scored_tweets in common.TWEETS_FILE
"""
try:
fp = open( common.TWEETS_FILE, 'at')
except:
logging.error('Could not open %s' % common.TWEETS_FILE)
return
try:
for tweet in scored_tweets:
logging.info(tweet.get_scored_line())
fp.write('%s\n' % tweet.get_tweet_line())
finally:
fp.close()
class Activity:
"""An activity record.
This is used for generating summary tweets based on our tweet reply
activity
_api : Twitter api instance
_last_reply_num: The number of replies we had made the last time we tweeted a summary
_reply_delta: The min number of replies between summary tweets
_last_time: The time we last made a summary tweet
"""
SUMMARY_TM_FORMAT = '%I:%M%p %a %d %b %Y'
@staticmethod
def encode_summary(tweet_delta, tm):
"""Write tweet_delta=3 tm=11:43PM Fri 17 Aug 2012 as
'Twitter has been busier than Liebig St on a Friday afternoon.
I have empathised with 3 people since 11:43PM Fri 17 Aug 2012'
"""
tm_str = get_local_time_str(tm)
return 'Twitter has been busier than Liebig St on a Friday afternoon. ' + \
'I have empathised with %d people since %s.''' % (tweet_delta, tm_str)
@staticmethod
def read_activity():
tweet_num, tweet_delta, tm = 0, 0, 0.0
try:
text = file( common.ACTIVITY_FILE, 'rt').read().strip('\n')
parts = [p.strip() for p in text.split('|')]
tweet_num, tweet_delta, tm = int(parts[0]), int(parts[1]),float(parts[2])
except:
log_sys_err('Could not read %s' % common.ACTIVITY_FILE)
return tweet_num, tweet_delta, tm
@staticmethod
def write_activity(tweet_num, tweet_delta, tm):
parts = tweet_num, tweet_delta, tm
text = ' | '.join([str(p) for p in parts])
try:
file(common.ACTIVITY_FILE, 'wt').write(text)
except:
log_sys_err(' Could not save activity')
def __init__(self, api):
self._api = api
self._last_reply_num, self._reply_delta, self._last_time = Activity.read_activity()
Activity.write_activity(self._last_reply_num, self._reply_delta, self._last_time)
logging.info('Activity.__init__: %s' % self)
def __repr__(self):
return Activity.encode_summary(self._reply_delta, self._last_time)
def post_summary_tweet(self, replied_tweets, tweet):
"""Post a summary tweet from time to time.
"""
tweet_num = len(replied_tweets)
# To keep this infrequent, we don't post until we have
# exceeded the number of tweets in the last summary post
if tweet_num <= self._last_reply_num + self._reply_delta:
return
summary = Activity.encode_summary(tweet_num - self._last_reply_num, self._last_time)
logging.info('summary="%s" %d' % (summary, len(summary)))
try:
self._api.PostUpdate(summary)
time.sleep(1)
except Exception:
log_sys_err(' Twitter api error posting summary "%s"' % summary)
# Increase the delta each time we make a summary post
tweet_delta = self._reply_delta + 10
self._last_reply_num, self._reply_delta, self._last_time = tweet_num, tweet_delta, tweet._time
Activity.write_activity(tweet_num, tweet_delta, tweet._time)
FRIENDLIES = [
'peter_c_william',
'alecthegeek',
'PaperCutDev'
]
l_friendly_users = set(user.lower() for user in FRIENDLIES)
def reply_to_tweets(api, activity, replied_tweets, scored_tweets):
"""Make Twitter replies to scored_tweets
api: Twitter API object
activity: An Activity record
replied_tweets: List of all tweets that we have ever replied to
scored_tweets: List of recently tweets that are candidates for replying to/
"""
l_replied_users = get_replied_users(replied_tweets)
try:
fp = open(common.REPLIES_FILE, 'at')
except IOError:
# We MUST bail out here as we risk replying to tweets more than once
# if we don't record who we have replied to.
logging.error('Could not open %s', common.REPLIES_FILE)
return
try:
for tweet in scored_tweets:
l_message = tweet._message.lower()
# Don't reply to users more than once
if tweet._user.lower() in l_replied_users:
# unless they are friendly
if tweet._user.lower() not in l_friendly_users:
logging.info(' skipping: already replied to %s' % tweet._user)
continue
# Don't reply to responses
if common.TWITTER_ME.lower() in l_message:
logging.info(' skipping: response "%s"' % tweet._message)
continue
# Don't reply to mentions of tweets we have responded to
responded_user = next((u for u in l_replied_users if A(u).lower() in l_message), None)
if responded_user:
logging.info(' skipping: mention: %s:"%s:' % (A(responded_user), tweet._message))
continue
reply_message = get_reply_message(tweet._user)
logging.info(' Posting in reply to %s: %s' % (A(tweet._user), str(reply_message)))
# Update replied list before replying in case something goes wrong
# in updating list or replying
replied_tweets.append((tweet._id, tweet._user))
fp.write('%s\n' % tweet.get_tweet_line())
l_replied_users.add(tweet._user.lower())
try:
api.PostUpdate(reply_message, in_reply_to_status_id=tweet._id)
time.sleep(1)
except Exception:
logging.error(' Twitter api error: %s' % str(sys.exc_info()[0:2]))
activity.post_summary_tweet(replied_tweets, tweet)
finally:
fp.close()
def run_main_loop(max_duration, replying_enabled):
"""The out monitor/reply loop for communicating with Twitter
max_duration: Maximum time to run this loop for (seconds)
replying_enabled: Reply to tweets?
"""
logging.info('max_duration=%d, replying_enabled=%s' % (max_duration, replying_enabled))
start_time = time.time()
# Delay between loops
delay = 0.1
def elapsed():
"""Elapsed time since start"""
return time.time() - start_time
# Load the classification model first
# This is critical for classifying tweets for reply
# It is helpful for seeing which tweets would be replied to
# when we are running in non-replying mode
# The model will not be available in early stage of development
# before tweets have been saved and labeled
model = common.load_model()
if replying_enabled:
assert model, 'Cannot reply without a classification model'
logging.info('Using %s classifier' % model.__class__.__name__)
# Lastest tweet id (an integer) is stored as text in LATEST_FILE
# We use to prevent re-reading tweets
latest_tweet_id = int(file(common.LATEST_FILE, 'rt').read().strip()) if os.path.exists(common.LATEST_FILE) else 0
logging.info('latest_tweet_id=%d' % latest_tweet_id)
# Load the tweets that have already been replied to
replied_tweets = load_replied_tweets()
# Credentials are stored in CREDENTIALS_FILE as text lines of key='value'
# The keys are: consumer_key, consumer_secret, access_token_key, access_token_secret
RE_CREDENTIALS = re.compile(r"(\w+)='([^']+)'")
credentials = dict((m.group(1),m.group(2))
for m in RE_CREDENTIALS.finditer(file(common.CREDENTIALS_FILE,'rt').read()))
# Create an object that gives access to the Twitter APIs
api = twitter.Api(**credentials)
# Create an Activity object for generating summary tweets
activity = Activity(api)
# The main loop. Runs for max_duration seconds with delay seconds
# between iterations.
while elapsed() + delay < max_duration:
time.sleep(delay)
# Fetch tweets that were created since the last time we checked
latest_tweet_id += 1
scored_tweets = fetch_latest_scored_tweets(api, model, latest_tweet_id)
if scored_tweets:
# Record all tweets
scored_tweets.sort(key = lambda t: (not t._replyable, -t._score, t._id))
latest_tweet_id = max([t._id for t in scored_tweets])
file(common.LATEST_FILE, 'wt').write(str(latest_tweet_id))
record_tweets(scored_tweets)
replyable_tweets = [t for t in scored_tweets if t._replyable]
# Reply to all the tweeets that we should reply to
if replying_enabled and replyable_tweets:
reply_to_tweets(api, activity, replied_tweets, replyable_tweets)
# Back off if there were no matching tweets
delay = 10 if scored_tweets else delay * 2
delay = max(10, min((abs(elapsed() - max_duration)/10), delay))
logging.info('Found %3d replyable of %3d relevant results, latest_id=%d, sleeping %5.1f sec, running %4d sec (%4d remaining)' % (
len([t for t in scored_tweets if t._replyable]),
len(scored_tweets), latest_tweet_id,
delay, elapsed(), max_duration - elapsed()))
if __name__ == '__main__':
"""Run the main loop for a specified amount of time
and catch all fatal exceptions.
This progam is expected to be run by a scheduler that restarts it
after max_duration + 5 minutes
"""
import optparse
parser = optparse.OptionParser('python %prog [options] <duration(min)>')
parser.add_option('-r', '--reply', action='store_true', dest='replying_enabled', default=False, help='reply to tweets')
(options, args) = parser.parse_args()
if len(args) < 1:
parser.error('Duration not specified')
max_duration = int(args[0]) * 60
logging.info('-' * 80)
logging.info('Starting %s' % str(sys.argv[0]))
run_main_loop(max_duration, options.replying_enabled)
try:
run_main_loop(max_duration, options.replying_enabled)
except Exception:
log_sys_err('Uncaught error')
logging.info('Finished normally')