Hi, I try me on my first snippet of Pythonista, but need some more help.

I have following code already, but that still does not work. Help me someone?

<code>import clipboard
import urllib
import urllib2

kurzurl = clipboard.get()

def shorten_url(long_url):
username = 'USERNAMW'
apikey = 'APIKEY'
bitly_url = "http://api.bit.ly/v3/shorten?login={0}&apiKey={1}&longUrl={2}&format=txt"
req_url = urlencode(bitly_url.format(username, apikey, long_url))
short_url = urlopen(req_url).read()
return short_url

print shorten_url('kurzurl')</code>