pip/pip3 confusion and keeping up to date

[Dieter Maurer]

Karsten Hilbert wrote at 2023-11-3 14:47 +0100:
> ...
>> Are they not available in your system's package manager?
>
>... this clearly often answers to "no" for applications of
>any complexity.
>
>Is there a suggested proper path to deal with that (Debian is
>of interest to me here) ?

Complex applications may maintain a set of "known workable versions"
associated with the application's releases.
They may describe those "known workable versions" in a `pip` constraint file.
In this case, you can upgrade to a new application release
by using this constraint file.