Indicate python version mismatch rather than say no versions available.

[ConnorStoneAstro]

What's the problem this feature will solve?

I was trying to install a package (caskade) which only supports python 3.9 and up. I mistakenly was using python 3.8 and so kept getting this message:

ERROR: Could not find a version that satisfies the requirement caskade (from versions: none)
ERROR: No matching distribution found for caskade

Describe the solution you'd like

It would have been great if there had been a message saying something like "versions exist for python 3.9 you are using python 3.8..."

Alternative Solutions

even a simpler message would work

Additional context

NA

Code of Conduct

• I agree to follow the PSF Code of Conduct.

[notatallshaw]

Thanks for reporting, this has been reported before, such as the similiar #10784 (or #6695 or #6526).

My understanding is currently at the time of the error this information isn't available because pip already filtered out packages which are mismatching. But I'm sure if someone provided a high quality PR that improved the situation here it would be considered.