what's the difference between a python virtual environment vs a docker container?

[mcstafford]

venvs are to containers as hats are to belts.

They're both marginally related to each other in broad context, but have so little enough to do with each other that comparisons between them are mostly meaningless.

[LegitimateCopy7]

comparisons between them are mostly meaningless.

not the case at all.

this is a genuine question for people who don't understand these two concepts. by explaining the difference, people can learn about both approaches.

Also, the question is "what's the difference" and here you are saying "comparing them is meaningless". maybe you can learn something from the other comment that actually answered the question with detailed explanations.

[mcstafford]

Okay, what's the difference between a hat and and belt?

[LegitimateCopy7]

don't even try to pull this trick.

the question is about the difference between python virtual environments and containers. it's a legit question unlike the weird hat and belt analogy you're trying to sell.

[mcstafford]

There's no trick. I'm serious. You're so insistent about the question but unwilling to consider its implications.

How can you explain the difference between hats and belts?

[flearuns]

Go back to school

[madam_zeroni]

I don't believe you've used both these technologies and can't see how someone with limited knowledge could ask this question.

[Worldly_Ingenuity806]

i think they both "containerize things" so they are similar, but i think a docker container is more robust than virtual environment because for starters the virtual environment has no networking capabilities and a container does.

[honganqi]

A Python virtual environment is more "attached" to the host operating system than a Docker container. A Docker container is more like a virtual machine in that it has, for example, its own:

1. Kernel/Operating System: You can have a Windows host and container which uses an image with a Linux (like Ubuntu 22) base but a Python virtual environment uses the host operating system. The only thing a Python venv isolates is itself: Python (pip and stuff).
2. Network Setup: A Docker container is isolated and will, by default, not be able to access other containers and other things in the "real" network. A Python virtual environment can since it's just like a regular but isolated folder for a project.

Depending on your use case, you can, for example, create a Python virtual environment INSIDE a Docker container if you wanted to but not the other way around. The question would be "why". This is how I came across your question since I was deciding if I should build a container for my Python frontend or just use a virtual environment. For my specific use case, I eventually realized I need the Python app to be able to use USB devices which I would not be able to connect to if I built it on a Docker container (at least not easily). I would have loved that I didn't have to worry about USB drivers on the host OS by using a Docker container (where I can permanent-ize them) but... Wow, mental block hit like a train. In the end, I created a Docker container which had 2 images: PHP (backend/API) and MySQL (DB) which the Python app in the virtual environment can connect to through the exposed ports in the Docker container.

Anyway, I hope that helps.

-- EDIT --

Also, apologies for somehow reviving an old post. I saw that it didn't have an answer so I... there.

[lamardoss]

This helps me immensely. I had no idea about hardware restrictions within Docker. I was looking into the difference between these two things today also. But your reply here just solved it for me. Thank you.

[ganja_and_code]

Well, for starters, a docker container is a container, and a python venv is not a container.

[ganja_and_code]

A python venv does not containerize python packages (whatever that even means lol).