PEP suggestion: Uniform way to indicate Python language version

[Rustom Mody]

On Monday, August 22, 2016 at 7:00:36 PM UTC+5:30, Steve D'Aprano wrote:
> Realistically, by the time you convince people this is a useful feature,
> write a patch and have the patch reviewed, you'll be looking at Python 3.7.
> So 3.7 will have this new syntax "use version", and *no other version*.
> That means you can't use it until you are ready to abandon Python 2.4
> through 3.6.

Yes 

First-class version detection and management needs to be put into the language
right at the outset if it is to work
If you do it late in the history (like now for python), you need to
1 First detect if first-class version management is supported
2 If yes use it
3 If no use the old ad-hoc ways

So might as well use 3 alone!!