|
Another option is Nix, which with some
effort can be installed in Ubuntu and can provide you with
different environments for many languages. You can use it to
create as many python installations as you want.
On 22/07/2021 20:05, Dan Yasny wrote:
I guess I don't
completely understand the concept after all. If I setup
a virtual environment for 3.9.6, how would it "know" that
modules are
installed in the 3.8 directory? As I wrote in my original
post, without
a virtual environment, in 3.9.6 I get:
>>> import scapy
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
ModuleNotFoundError: No module named 'scapy'
but the module does exist in 3.8:
sudo pip3 install scapy
Requirement already satisfied: scapy in
/usr/local/lib/python3.8/dist-packages (2.4.4)
So how do I tell the 3.9.6 environment to look for modules
in the 3.8
directory?
You don't, that's the whole point of venv - you have a
separate set of modules in each environment, specific to
it's version.
There's the site-packages argument of course, but it's far
from being best-practice.
On Thu, 22 Jul 2021 12:41:41 -0400
Dan Yasny <dya...@gmail.com>
wrote:
> why reinstall? Keep your versions venvs in place and
hop in/out
>
>
> On Thu, Jul 22, 2021 at 12:37 PM Shlomo Solomon
> <shlomo.solo...@gmail.com>
wrote:
>
> > Omer Zak <w...@zak.co.il>
wrote:
> > > The answer to your prayers is pyenv.
> > > It allows you to install multiple Python
versions in parallel,
> > > and for each version you can maintain several
virtualenvs.
> >
> > Dan Yasny <dya...@gmail.com>
wrote:
> > > How about using virtualenv for alternative
versions?
> >
> >
> > Yes, I know about pyenv and virtualenv, but
wouldn't I have to
> > re-install modules for each version/environment?
That's what I'm
> > trying to avoid.
> >
> >
> > --
> > Shlomo Solomon
> > http://the-solomons.net
> > Claws Mail 3.17.5 - KDE Plasma 5.18.5 - Kubuntu
20.04
> >
--
Shlomo Solomon
http://the-solomons.net
Claws Mail 3.17.5 - KDE Plasma 5.18.5 - Kubuntu 20.04
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