Hi, Barry Scott wrote: >> On 6 Jul 2021, at 18:35, Todd Zullinger <tmz@xxxxxxxxx> wrote: >> 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. Not specific (as I don't use pip). But if you install a new/different version of some module via pip and use it in your code, it then works for you and breaks when you run the code as another user. Things like that were what I intended by "interact badly." Depending on your use, that's a feature and not a bug. It's fine if you know about the potential pitfall. I figure the folks who know those well will know when they can ignore the general advice to isolate their use of pip from the packaged bits. And, of course, the folks on the Fedora Python team (and others) have been working to improve the way in which pip and system modules interact, so some of these potential pitfalls are less than they used to be (or will be so, eventually). > 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. Indeed, I didn't intend to suggest it would fail. It just doesn't always lead to a great experience for users who aren't aware of the ways things might interact between modules in ~/.local and site-packages. Hopefully that helps clarify what I meant a bit better. Thanks, -- Todd
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