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38 lines
2 KiB
Markdown
38 lines
2 KiB
Markdown
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---
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title: "How to use pipx with pyenv"
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tags: ['pipx', 'pyenv', 'python']
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date: 2020-12-30T08:40:58.362871+00:00
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---
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## 👨🏻💻 TL;DR
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In my case with `fish` I added this line to my `config.fish`:
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```fish
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set -gx PIPX_DEFAULT_PYTHON "$HOME/.pyenv/versions/3.8.5/bin/python"
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```
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It's roughly the bash equivalent for
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```bash
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export PIPX_DEFAULT_PYTHON="$HOME/.pyenv/versions/3.8.5/bin/python"
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```
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## 📖 Backstory
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As a Python developer, my workflow often involves running multiple versions of Python on different projects. To help me in this task, I use [`pyenv`](https://github.com/pyenv/pyenv) which is a wonderful tool to easily install and manage multiple Python versions on your system.
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I also have a Python version installed via [Homebrew][brew] for some formulae that require it. This version is the default for any script if pyenv doesn't specify any version.
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[brew]: https://brew.sh/
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Finally, I also use [`pipx`](https://pipxproject.github.io/pipx/) which allows me to install python packages in their own virtual environment without messing with my system installation and still have them ready for use on the command line.
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My problem is that `pipx` will by default use the Python version provided by Homebrew to install the executables. As I keep my system up to date with Homebrew, the Python version often updates. When that happens, all of my `pipx` packages break and I have to reinstall them all. Granted, `pipx` provides a command to do that easily but I'd still like to avoid the operation.
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Thankfully, as [documented](https://pipxproject.github.io/pipx/docs/)[^1], `pipx` supports an environment variable called `PIPX_DEFAULT_PYTHON`. You just need to point it to your preferred Python interpreter and be done with it!
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[^1]: Also available when running `pipx --help`
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!!! info "Update"
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I've now [switched](/setup-rtx-with-direnv-for-python/) from `pyenv` to `rtx` but the concept remains the same: install python with `rtx`, then set `PIPX_DEFAULT_PYTHON`.
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