code: def set_cookie(self, key, value, **kargs):
          
          if not isinstance(value, basestring):
              sec = self.app.config['securecookie.key']
              value = cookie_encode(value, sec).decode('ascii') #2to3 hack
          self.COOKIES[key] = value
          for k, v in kargs.iteritems():
              self.COOKIES[key][k.replace('_', '-')] = v
docs: Add a new cookie with various options.
  
          If the cookie value is not a string, a secure cookie is created.
  
          Possible options are:
              expires, path, comment, domain, max_age, secure, version, httponly
              See http://de.wikipedia.org/wiki/HTTP-Cookie#Aufbau for details