Created
July 8, 2010 05:13
-
-
Save lygaret/467661 to your computer and use it in GitHub Desktop.
watch and rank links coming from twitters public timeline
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
#!/usr/bin/env python | |
# Watch and rank links coming from twitter's public timeline. | |
# Currently this doesn't really work all that well, as we can only get 20 | |
# tweets a minute, but it's an idea. | |
# Requires the following non-standard python libs: (install with easy_install) | |
# * simplejson | |
# * functional | |
# * sqlalchemy | |
import urllib, simplejson as json, re, operator | |
import sqlalchemy as sql | |
from sqlalchemy import orm, ext | |
from sqlalchemy.ext import declarative | |
from functional import partial, flip | |
# helpers | |
def flatten(l): | |
return reduce(operator.add, l) | |
def encode(str, *args): | |
return str.encode(*args) | |
# DB stuff | |
Session = sql.orm.sessionmaker() | |
Base = sql.ext.declarative.declarative_base() | |
class Tweet(Base): | |
__tablename__ = 'tweets' | |
tweet_id = sql.Column(sql.Integer, primary_key = True) | |
def __init__(self, id): | |
self.tweet_id = id | |
class Link(Base): | |
__tablename__ = 'links' | |
id = sql.Column(sql.Integer, primary_key = True) | |
url = sql.Column(sql.String(500)) | |
count = sql.Column(sql.Integer) | |
def __init__(self, url, count): | |
self.url = url | |
self.count = count | |
def __repr__(self): | |
return "<Link %s (%d)>" % (self.url, self.count) | |
# create the table if it doesn't exist | |
engine = sql.create_engine('sqlite:///tweets.db') | |
Tweet.metadata.create_all(engine) | |
Link.metadata.create_all(engine) | |
# get the timeline and links in it | |
timeline = urllib.urlopen('http://www.twitter.com/statuses/public_timeline.json').read() | |
timeline = json.loads(timeline) | |
encode = partial(flip(encode), 'ascii') | |
find_urls = re.compile(r'http://[^\s]+[^\s\.]') | |
links = [] | |
tweets = [Tweet(t['id']) for t in timeline] | |
for matches in [map(encode, find_urls.findall(t['text'])) for t in timeline]: | |
if len(matches) > 0: | |
tweet_links = [] | |
for url in matches: | |
# find the real URL (after redirects) | |
url = urllib.urlopen(url) | |
url = url.geturl() | |
tweet_links.append(Link(url, 1)) | |
links.append(tweet_links) | |
else: | |
links.append(None) | |
stuff = zip(tweets, links) | |
stuff = filter(lambda s: s[1] != None, stuff) | |
# db stuff | |
Session.configure(bind = engine) | |
session = Session() | |
# if the tweet hasn't been seen before | |
for tweet, links in stuff: | |
if session.query(Tweet).filter_by(tweet_id = tweet.tweet_id).count() == 0: | |
session.add(tweet) | |
for new_link in links: | |
try: | |
orig_link = session.query(Link).filter_by(url = new_link.url).one() | |
except Exception: | |
session.add(new_link) | |
else: | |
orig_link.count += 1 | |
session.add(orig_link) | |
# done adding, commit and close | |
session.commit() | |
session.close() |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment