Setting a cookie to expire on browser close

[jechu]

How would I go about making a cookie that expires once the browser is
closed? I've taken a quick look at the code in the
tornado.web.RequestHandler class and noticed that there are parameters
that allow you to specify expiration times, but I don't see anything
that allows you to specify that the cookie expires whenever the
browser closes.

Thanks!

[Brian Browning]

The default setting for tornado cookies is to expire at end of session.

So you shouldn't have to do anything special, 

just set the cookie, close your browser , and the cookie will be gone.

[Li Hui]

I found the default expire time of set_secure_cookie is one month.

-- 
Li Hui