Shorten links with Bitly API in Pythonista

Bitly

#coding: utf-8
#shortens urls from clipboard using bitly
import sys
import requests
import re
import clipboard
import keychain

def shorten(long_url, token):
	if re.match('\w{40,40}', token):
		if long_url == '':
			raise Exception('Nothing found in clipboard')
		elif not re.match('http(s)?://.*', long_url):
			raise Exception('Not a proper url found in clipboard')
		else:
			pass
	else:
		raise Exception('Bitly token seems wrong')

	print 'Shortening url: ' + long_url + '\n'
	userdata = {
	'access_token': token,
	'longUrl': long_url,
	'format': 'json'
	}
	endpoint = 'https://api-ssl.bitly.com/v3/shorten?'
	response = requests.get(endpoint, params = userdata)
	j = response.json()
	if not j['status_code'] == 200:
		raise Exception('bitly returned error: '+j['status_txt'])
	url = j['data']['url']
	# check fails with on.wsj.com etc..
	# if not re.match('http://bit.ly/\w{7,7}', url):
	#    raise Exception('Received not a proper bitly url')
	return url

token = keychain.get_password('Bitly', 'token')
if len(sys.argv) > 1:
	long_url = sys.argv[1]
else:
	long_url = clipboard.get()
short_url = ''

try:
	short_url = shorten(long_url, token)
except Exception, err:
	import sys
	sys.stderr.write('ERROR: %s\n' % str(err))

if short_url:
	print short_url