== Sometimes an Ubuntu package of a Python module is probably good enough Recently [[I ran across a Python program we're interested in https://mastodon.social/@cks/109479687630006353]], and discovered that it required [[prometheus-client https://pypi.org/project/prometheus-client/]]. Normally this would mean creating a virtual environment and installing the module into it, possibly along with the program (although [[you don't have to put the program inside the venv it uses VenvsWithProgramsOutside]]). But when I looked out of curiosity, I saw that Ubuntu packages this module, which got me to thinking. I'm generally a sceptic of relying on the Ubuntu packaged version of a Python module (or any OS's packaged version); I wrote about this years ago [[in the context of Django DjangoUbuntuLTSBadIdea]]. Linux distribution packaging of Python modules is famously out of date, and Ubuntu makes it worse [[by barely fixing bugs at the best of times ../linux/DebianVsUbuntuForUs]]. However, this feels like a somewhat different situation. The program isn't doing anything much with the prometheus-client module, and the module itself isn't very demanding; probably quite a lot of versions will do, and there's unlikely to be a bug that affects us. Indeed, some quick testing of the program with the Ubuntu version suggests that it works fine. (Although now that I look, the Ubuntu version is rather out of date. Ubuntu 22.04 LTS packages 0.9.0, from 2020-11-26, and right now according to [[the module's releases page https://github.com/prometheus/client_python/releases]] it's up to 0.15.0, with quite a few changes.) Provided that Ubuntu's version of the module works, which it seems to, using the Ubuntu packaged version is the easy path. It's not an ideal situation, but for something with simple needs (and which isn't a high priority), it's rather tempting to say that it's okay. And if the Ubuntu version proves unsatisfactory, changing over to the latest version in a virtual environment is (at one level) only a matter of changing the path to Python 3 in the program's '#!' line. (We have [[another program https://github.com/ccwienk/temper]] that requires a Python module, pyserial, that we get from Ubuntu, but I didn't think about it much at the time. This time around I first built a scratch venv for the program to test it, then discovered the Ubuntu package.)