I am having trouble running the script to install the gnome-shell-google-calendar extension into Gnome Shell. I keep getting this:

rafael@Raf:~$ ./calendar/gnome-shell-google-calendar.py

Logging in as 'None'...

Please choose the Account: I enter my email here

Traceback (most recent call last):

  File "./calendar/gnome-shell-google-calendar.py", line 455, in <module>

    account = oauth.oauth_prompt()

  File "/home/rafael/calendar/oauth.py", line 25, in oauth_prompt

    email = accounts[int(raw_input('Please choose the Account: '))]

ValueError: invalid literal for int() with base 10: 'email address'

I replaced my actual email address with the words email address for privacy purposes.

A bit more info on this extension can be found here:
https://github.com/jnns/gnome-shell-google-calendar
http://maketecheasier.com/integrate-google-calendar-into-gnome-shell/2011/10/04

Is there a way of fixing this?