Linux terminals vs Windows consoles - was Re: python 2.7.12 on Linux behaving differently than on Windows

Michael Torrie torriem at gmail.com
Thu Dec 8 12:08:43 EST 2016


On 12/08/2016 09:35 AM, Michael Torrie wrote:
> Yes Control codes are, well control codes.  Any ascii value under 32.
> They are more or less common across terminal types.  I don't know of any
> way around that with terminals.

That is to say that on all terminal types that I'm aware of, the ENTER
key is encoded as Control-M, or 13.  Since they are the same key,
there's no way in any terminal to differentiate between pressing
control-M and the enter key.  I guess this limitation has been with us
so long that people did other things.  In unix terminal apps, often the
meta key is used as a modifier.  This is usually the "Alt" key.

If you need to differentiate between ENTER and control-M specifically,
you'll have to build a GUI app instead.  One that won't be able to run
remotely over a tty stream.

I know you want your apps to be exactly the same across platforms, but
that's not always possible, nor always desirable. For example, on Macs,
control-key is not normally used, but rather the Command-key (the apple
key) which happens to be where the Alt key is on our PC keyboards.




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