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I want to switch to uv from pyenv but one use case that didn't manage to figure out is if I can have similar setup like pyenv that I install few python version

by pzo 2y ago

I want to switch to uv from pyenv but one use case that didn't manage to figure out is if I can have similar setup like pyenv that I install few python version and setup one to be a global default (configured in zsh). I know for bigger projects proper way is to setup virtual environment for all new project but I do many mini (throwaway) python scripts and experiments or testing repos in python and would be really annoying to setup environment for those - so far pyenv worked well for me for such cases without having pretty much dependency conflicts.

js2 2y ago
Yes, uv is well suited to that use case by declaring your Python version and/or dependencies right in the script itself: https://docs.astral.sh/uv/guides/scripts/#declaring-script-dependencies https://docs.astral.sh/uv/guides/scripts/#declaring-script-d... You can use an alternate shebang line so you can run the script directly: #!/usr/bin/env -S uv run --script # /// script # requires-python = ">=3.12" # dependencies = [ # "requests", # "typer-slim", # ] # /// import requests import typer # ...
- pzo 2y ago
  Yes but I then still then have to declare all dependencies for all tiny throwaway script, right now I have global python in pyenv and installed tons of plugins and didn't have too much issues with conflicts so was good enough for me
  - biorach 2y ago
    How about just install a python version with uv and install everything into that? Or better, do the above, then create a virtual env, set the virtual env in your.bashrc and install everything into that Better still... use uv script --init See other comments on this post
  - jsmeaton 2y ago
    I used to have the same setup - a global tools venv with some useful dependencies. Uv takes the position that since it’s so fast to install dependencies and create environments, you don’t maintain a global venv. uvx ruff file.py Will setup a venv, install ruff into it, and run over your file. https://docs.astral.sh/uv/guides/tools/ https://docs.astral.sh/uv/guides/tools/ Otherwise you can: uv run —-with package file.py If you don’t want to declare your dependencies. https://docs.astral.sh/uv/guides/scripts/#running-a-script-with-dependencies https://docs.astral.sh/uv/guides/scripts/#running-a-script-w...
  - sorenjan 2y ago
    You could make an alias for creating a new python script that adds your favorite libraries as dependencies: alias newpy='function _newpy() { default_deps=("rich" "requests"); uv init --script "$1" && uv add "${default_deps[@]}" --script "$1"; }; _newpy'

by pzo 2y ago

js2 2y ago

Yes, uv is well suited to that use case by declaring your Python version and/or dependencies right in the script itself: https://docs.astral.sh/uv/guides/scripts/#declaring-script-dependencies https://docs.astral.sh/uv/guides/scripts/#declaring-script-d... You can use an alternate shebang line so you can run the script directly: #!/usr/bin/env -S uv run --script # /// script # requires-python = ">=3.12" # dependencies = [ # "requests", # "typer-slim", # ] # /// import requests import typer # ...

pzo 2y ago
Yes but I then still then have to declare all dependencies for all tiny throwaway script, right now I have global python in pyenv and installed tons of plugins and didn't have too much issues with conflicts so was good enough for me
- biorach 2y ago
  How about just install a python version with uv and install everything into that? Or better, do the above, then create a virtual env, set the virtual env in your.bashrc and install everything into that Better still... use uv script --init See other comments on this post
- jsmeaton 2y ago
  I used to have the same setup - a global tools venv with some useful dependencies. Uv takes the position that since it’s so fast to install dependencies and create environments, you don’t maintain a global venv. uvx ruff file.py Will setup a venv, install ruff into it, and run over your file. https://docs.astral.sh/uv/guides/tools/ https://docs.astral.sh/uv/guides/tools/ Otherwise you can: uv run —-with package file.py If you don’t want to declare your dependencies. https://docs.astral.sh/uv/guides/scripts/#running-a-script-with-dependencies https://docs.astral.sh/uv/guides/scripts/#running-a-script-w...
- sorenjan 2y ago
  You could make an alias for creating a new python script that adds your favorite libraries as dependencies: alias newpy='function _newpy() { default_deps=("rich" "requests"); uv init --script "$1" && uv add "${default_deps[@]}" --script "$1"; }; _newpy'