this post was submitted on 23 Nov 2024
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Python

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constraint vs requirement. What's the difference? (programming.dev)
submitted 4 days ago* (last edited 4 days ago) by [email protected] to c/[email protected]
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In a requirements-*.in file, at the top of the file, are lines with -c and -r flags followed by a requirements-*.in file. Uses relative paths (ignoring URLs).

Say have docs/requirements-pip-tools.in

-r ../requirements/requirements-prod.in
-c ../requirements/requirements-pins-base.in
-c ../requirements/requirements-pins-cffi.in

...

The intent is compiling this would produce docs/requirements-pip-tool.txt

But there is confusion as to which flag to use. It's non-obvious.

constraint

Subset of requirements features. Intended to restrict package versions. Does not necessarily (might not) install the package!

Does not support:

  • editable mode (-e)

  • extras (e.g. coverage[toml])

Personal preference

  • always organize requirements files in folder(s)

  • don't prefix requirements files with requirements-, just doing it here

  • DRY principle applies; split out constraints which are shared.

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[–] [email protected] 1 points 1 day ago (1 children)

I totally agree with you. So not the best champion of the poetry approach. Someone else would need to step forward, even as devils advocate, and champion poetry. Even if tongue in cheek. Anyone?

Normally, there is no connection between constraint files and pyproject.toml

Python appears to be forever stuck with plain text requirement|constraint files. So putting them into pyproject.toml is just adding an extra layer of complexity.

[–] [email protected] 1 points 1 day ago (1 children)

If most people prefer pyproject.toml over requirements.txt, even if it does not support everything you need, isn't it more likely that you will have to change workflow rather than python remaining stuck with requirement.txt?

[–] [email protected] 1 points 4 hours ago* (last edited 4 hours ago)

more likely

That almost sounds like you might consider to jump on polymarket, initiate the prediction, put money down on that prediction creating a position, but need a little nudge.

Are you willing to make that bet? The size of the bet reflects how strongly you feel. Are you going to make this interesting?

The other side of that bet would be:

Could become that guy who extends the theory, makes a better way of doing it, and creates and publishes the package and docs.

And the world+dog recognizes the package amongst the other tools in this genre, rather than i conforming to existing tools (uv or poetry or pip-compile-multi).

In your favor, there are three tools. So three people/teams on this planet have presented a solution. Can count that on one hand with fingers to spare!

On the other hand, lets keep in mind, this is a Python specific forum and everyone here are skilled super talented coders and probably full on freak'n geniuses (lifts hand, pinky to closest edge of mouth, everyone looks around at one another and copies, then looks back at you with an errie almost coordinated synchronized eye brow raise). And i oddly posted about this exact topic. Literally anyone and everyone who has commented could be that guy.

scratches head

looks up with one eye to check star positions

rubs chin

occasional alternating strong eye brow movements ...

(with hand on chin) who is this guy, should i call his bluff by taking a position? Whats the likelihood he's secretly a closet poetry user and just some poser?

If you won, could you be sad?

If you lost, not get upset or ego hurt instead be much happier with the published tool over the money?

What are the odds looking like on this particular prediction?

Looking forward to you posting the URL to the prediction on polymarket then promoting the market to maximize your returns. First in and clean house. Rinse wash and repeat with this blowhard wannabe (referring to myself).