Re: Python libraries problem with F34

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> On 6 Jul 2021, at 18:35, Todd Zullinger <tmz@xxxxxxxxx> wrote:
> 
> Barry wrote:
>>> On 6 Jul 2021, at 03:38, Frederic Muller <fred@xxxxxxxx>
>>> wrote:
>>>> On 7/6/21 3:34 AM, Barry wrote:
> [...]
>>>> It’s fine to install packages with pip install —user.
>>>> Use of venv is very useful, but not mandatory.
>>>> 
>>> Actually it's not. That's what I do all the time. Rather
>>> than copying the explanation, I'll point whoever is
>>> interested into the explanations and the resolution *it
>>> seems to be a very common problem users are facing
>>> apparently*:
>>> https://lists.fedoraproject.org/archives/list/devel@xxxxxxxxxxxxxxxxxxxxxxx/thread/JNBGOXQ73P6VSOWYHGRT7T2IMMJ7RPSD/
>> 
>> I read all of the thread, i am on the dev list.
>> 
>> It told you to never install into the fedora system python
>> directories, which it appears you did.
>> It did not tell you that installing the user dirs will
>> break fedora.
> 
> Doing so can still interact badly with the system python
> modules.

Do you have an example of this? I'm sure it is possible,
but I've not seen this personally.

The only case I know of where a venv is a must is when you want 
to use conflicting sets of pip installed packages for different apps.

If the set of packages do not conflict I have never seen
pip install -user fail. I'd love to know of a case that does
fail and investigate it.

> While it's better to limit that to just one user rather than
> the whole system, it doesn't really help when the user who's
> got an odd python problem is your own. :)

If you pip install into the system then you will very likely break
something important.

> I think it's entirely reasonable advice to generally
> recommend using venv if you're using pip.  Personally, I'd
> package anything I needed before I'd ever use pip install.

I agree and even said so.

> 
> Can you get away with not doing so in every case?  Sure.
> But you have to know what those cases are.  So it's not good
> general advice to suggest you shouldn't bother with using
> venv, IMO.

Barry

> 
> -- 
> Todd
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