Get all tweets with a certain hashtag

tweets.py

from TwitterAPI import TwitterAPI
from TwitterAPI import TwitterRestPager
from natsort import versorted
import json, sys, glob, os


def main(args):
	if len(args) < 2:
		print "usage: python tweets.py #hashtag"
		print ""
		sys.exit(1)
	hashtag = args[1]
	lastfilenum = lastFile(hashtag)
	lastfile = hashtag + "-tweets." + str(lastfilenum) + ".json"
	tID = 0
	if lastfilenum == 0:
		currentfile = lastfile
	else:
		tID = mostRecentTweetID(lastfile)
		currentfile = hashtag + "-tweets."+ str(int(lastfilenum) + 1) + ".json"
	getTweets(currentfile, tID, hashtag)

def lastFile(hashtag):
	files = versorted(glob.glob(hashtag + "-tweets.*.json"))
	if len(files) == 0:
		return 0
	lastfilenum = files[len(files)-1].split('.')[1]
	return lastfilenum

def mostRecentTweetID(lastfile):
	filename = "tweets." + str(lastfile)
	file = open(lastfile, 'r')
	line = file.readline()
	data = json.loads(line)
	file.close()
	id = data['id']
	return id

def getTweets(currentfile, tID, hashtag):
	CONSUMER_KEY = 'YOURCONSUMERKEY'
	CONSUMER_SECRET = 'YOURCONSUMERSECRET'
	ACCESS_TOKEN_KEY = 'YOURACCESSTOKENKEY'
	ACCESS_TOKEN_SECRET = 'YOURACCESSTOKENSECRET'

	api = TwitterAPI(
		CONSUMER_KEY,
		CONSUMER_SECRET,
		ACCESS_TOKEN_KEY,
		ACCESS_TOKEN_SECRET)
	
	r = TwitterRestPager(api, 'search/tweets', {'q':hashtag, 'count':100})
	msgs = 1
	file = open(currentfile, 'w')
	for item in r.get_iterator():
		if 'text' in item:
			if item['id'] <= tID:
				break
			file.write(json.dumps(item))
			file.write("\n")
			sys.stdout.write('\r' + str(msgs) + " " + str(item['created_at']))
			sys.stdout.flush()
			msgs = msgs + 1
		elif 'message' in item and item['code'] == 88:
			print 'SUSPEND, RATE LIMIT EXCEEDED: %s\n' % item['message']
			break

	if file.tell() == 0:
		os.remove(currentfile)
	else:
		file.close()

if __name__ == "__main__":
	sys.exit(not main(sys.argv))