gistfile1.py

def connect_to_gmail(CREDENTIALS, email, oauth_token, oauth_token_secret):
    """
    Call this function to get an authenticated IMAP connection
    """
    consumer = OAuthEntity(CREDENTIALS[0], CREDENTIALS[1])
    access_token = OAuthEntity(oauth_token, oauth_token_secret)
    xoauth_string = GenerateXOauthString(
      consumer, access_token, email, 'imap',
      None, str(random.randrange(2**64 - 1)), str(int(time.time())))

    # connect to imap
    imap_conn = imaplib.IMAP4_SSL('imap.googlemail.com')
    #imap_conn.debug = 3
    imap_conn.authenticate('XOAUTH', lambda x: xoauth_string)
    imap_conn.select('INBOX')