On Thu, Jul 22, 2021 at 12:51 PM Shlomo Solomon <shlomo.solo...@gmail.com> 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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