code: def logout(self):
          
          if not self._env:
              return False
          self.json('/web/session/destroy', {})
          self._env = None
          self._login = None
          self._password = None
          return True
docs: Log out the user.
  
          >>> odoo.logout()
          True
  
          *Python 2:*
  
          :return: `True` if the operation succeed, `False` if no user was logged
          :raise: :class:`odoorpc.error.RPCError`
          :raise: `urllib2.URLError` (connection error)
  
          *Python 3:*
  
          :return: `True` if the operation succeed, `False` if no user was logged
          :raise: :class:`odoorpc.error.RPCError`
          :raise: `urllib.error.URLError` (connection error)