import time module

Traceback (most recent call last):
  File "web.py", line 8, in <module>
    class Globals:
  File "web.py", line 10, in Globals
    session  = CookieSession().get_session()
  File "......", line 89, in get_session
    expires=(int(time.time()) + self.cookie_expires))
NameError: global name 'time' is not defined