Re: [gentoo-user] Determine what's keeping Python 3.7 around?

[Victor Ivanov]

I'm on the same boat as Grant and, despite being fully up to date, have 
found it incredibly infuriating to not be able to figure out why I have 
so many python interpreters installed. I don't mind the consumed space, 
but I get the itch from not knowing *why*.

On 06/12/2020 20:16, Neil Bothwick wrote:
> emerge -cpv python:3.7 will show you what is keeping 3.7.

Thank you Neil for this amazing hack! This has truly been great at 
solving the mystery.

Using this I finally found out that on my system the only thing keeping 
Python 3.7 was:

app-office/libreoffice-bin-6.4.6.2-r2 requires dev-lang/python:3.7[xml]

On that note, I feel like I should share my sentiment on what I had 
tried before to solve this conundrum:

     $ eix --installed-with-use python_targets_python3_7
     $ eix --installed-with-use python_single_target_python7_7

but obviously the above only work for ebuilds that explicitly have the 
respective PYTHON_TARGETS and PYTHON_SINGLE_TARGET variables and will 
not include hard dependencies - this is to be expected.

More shockingly however, I was surprised that equery did not reveal 
_anything_ useful at all e.g.

     $ equery depends python:3.7
     $ equery depends '=dev-lang/python:3.7'
     $ eix --installed-depend python:3.7

eix above was also useless as it provided a very different output to 
that of `emerge -cpv'.  I thought the whole purpose of 'equery depends 
<atom>' was to do exactly that - list any packages that depend on the 
given atom. Or am I completely misunderstanding how the above 3 work?!

- Victor