Goo.gl url shortening wrapper for python

shurl.py

#!/usr/bin/python

from sys import argv
import httplib2
import simplejson as json

#API_KEY = ADD YOUR API KEY HERE , even if you don't shurl will still work

def shurl(longUrl):
    
    try: API_KEY
    except NameError:
        apiUrl = 'https://www.googleapis.com/urlshortener/v1/url'    
    else:
        apiUrl = 'https://www.googleapis.com/urlshortener/v1/url?key=%s' % API_KEY
    
    headers = {"Content-type": "application/json"}
    data = {"longUrl": longUrl}
    h = httplib2.Http('.cache')
    try:
        headers, response = h.request(apiUrl, "POST", json.dumps(data), headers)
        short_url = json.loads(response)['id']

    except Exception, e:
        print "unexpected error %s" % e
    return short_url

if __name__ == '__main__':
    print shurl(argv[1])