Hello, How can I generate pex files compatible for...
# generalg
gentle-florist-96289
09/15/2023, 5:21 AMHello, How can I generate pex files compatible for multiple python version? I generated a pex file but it works only if there exists a python3.10. How can I make it work for lets say python 3.8 and above?
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freezing-fall-2672
09/15/2023, 5:29 AMHey Shravan,
if you set py3.8 as the
interpreter_constraintspants.toml Copy code
[python]
interpreter_constraints = ["CPython==3.8.*"]freezing-fall-2672
09/15/2023, 5:29 AMyou need to have python 3.8 available locally
freezing-fall-2672
09/15/2023, 5:30 AM(f.e. with pyenv)
edit: with pyenv, without the 'f.e.'
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gentle-florist-96289
09/15/2023, 5:30 AMcan it also detect the environments from conda?
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freezing-fall-2672
09/15/2023, 5:30 AMah, good question
freezing-fall-2672
09/15/2023, 5:30 AMno idea 🙂
freezing-fall-2672
09/15/2023, 5:30 AMgive it a try I'd suggest
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gentle-florist-96289
09/15/2023, 5:31 AMHmmm okay.. I will try to put python interpreter constraints and check
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freezing-fall-2672
09/15/2023, 5:31 AMbut wait, conda isn't providing it's own python binary, is it?
freezing-fall-2672
09/15/2023, 5:31 AMconda is 'just' a pip
edit: that was maybe a little unfair to conda, it does a lot more 🙂
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gentle-florist-96289
09/15/2023, 5:32 AMwell if you create a env with conda it downloads a separate python binary along with it.
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freezing-fall-2672
09/15/2023, 5:32 AMah ok, didn't know that
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high-yak-85899
09/15/2023, 5:33 AMThere’s interpreter constraints settings on the pex binary target.
high-yak-85899
09/15/2023, 5:34 AM“3.8 and above” is a lot of variability fwiw
high-yak-85899
09/15/2023, 5:35 AMYou’ll have a rough time generating lock files for example if you have a large number of dependencies if you use such broad interpreter settings
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freezing-fall-2672
09/15/2023, 5:39 AMI agree with Nathanael of course - with the intent to support multiple python versions you increase at least your testing needs. here f.e. I've seen
toxg
gentle-florist-96289
09/15/2023, 5:50 AMI have a long way to go I guess. I haven't thought of lock files and testing at all 😅 I need to work on it. I have just generated the pex file and shared it across to my teammates.
gentle-florist-96289
09/15/2023, 5:50 AMWhere can I find some best practices for pants projects?
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freezing-fall-2672
09/15/2023, 5:55 AMI'd recommend to start with the most up-to-date python version possible
freezing-fall-2672
09/15/2023, 5:56 AMit's usually way more easy to just tell your team mates to install python 3.11 for example
freezing-fall-2672
09/15/2023, 5:56 AMand then the journey begins - eventually 3.12 3.13 etc. will appear and if the project still exists you'll have to handle those then anyways
freezing-fall-2672
09/15/2023, 5:57 AMbut to start from today with the past is work you can avoid easily if there is no hard requirement for a specific version, but then I'd maybe consider to just go with this particular one
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gentle-florist-96289
09/15/2023, 6:01 AMHmmm I need to check with my team why they are still sticking with 3.8..
gentle-florist-96289
09/15/2023, 6:01 AMOtherwise I will stick with one version of python for my project.
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freezing-fall-2672
09/15/2023, 6:02 AMyes, makes sense. also it might be possible to keep their py3.8 needs while you can still start with 3.11 - pyenv or as you said conda handles multiple versions in parallel on a system
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gentle-florist-96289
09/15/2023, 6:03 AMyup that's one more option.
gentle-florist-96289
09/15/2023, 6:03 AMThanks for the tip 🙂 @freezing-fall-2672 @high-yak-85899
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freezing-fall-2672
09/15/2023, 6:03 AMhappy to help 👋
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enough-analyst-54434
09/15/2023, 3:14 PMif you set py3.8 as the interpreter_constraints in pants.toml , so here maybe something like
[python]
interpreter_constraints = ["CPython==3.8.*"]
it'll work for python 3.8 on upwards to 3.11This is definitely not true. You'd need:
Copy code
[python]
interpreter_constraints = ["CPython>=3.8,<3.12"]