Which Python editor has this feature?

[jfong at ms4.hinet.net]

Terry Reedy at 2016/1/12 UTC+8 5:22:35AM wrote:
> IDLE has an optional 'code context' feature that shows header lines that 
> have scrolled up off the top of the screen.  This would let you see 
> which class you are in,

Thanks, Terry. It's just what I am looking for:-)
By the way, do you know how to open file in a new tab, instead of in a separate window, in the IDLE editor?

--Jach Fong