Why doesn't Python include non-blocking keyboard input function?

[Michael L Torrie]

On 10/27/2016 11:05 PM, Michael Torrie wrote:
> On 10/27/2016 04:07 AM, Terry Reedy wrote:
>> As I and others have said, those keyboard functions are not available on 
>> text terminals.  I predict that keyboard functions that so not work on 
>> all systems will never become built-ins.  But some are available with an 
>> import.

> Is this not what BartC is talking about?  

I see that BartC is wanting to detect keys like left shift and right
shift.  Even back in QB MS-DOS days when the program was running very
close to bare metal that wasn't possible using a QB construct.