Homebrew supported use of pyenv and Python is what?

[ghost]

A lot of stuff out there (mostly older possibly outdated information) on how to use pyenv to manage Python on macOS.
pyenv states it's a breeze to install via Homebrew, but how does Homebrew expect users to install Python, using brew install python or using pyenv install python 3.9.7?

If we choose pyenv as the installer for Python will Homebrew work dependably?

Looking at the upcoming changes to Python 3.12, it seems safer to use pyenv to install Python versions.

I have spent about 5 hours on this so giving up and hoping for some help.

[alebcay]

how does Homebrew expect users to install Python, using brew install python or using pyenv install python 3.9.7?

Either should work.

If we choose pyenv as the installer for Python will Homebrew work dependably?

Yes. Note that packages in Homebrew that depend on Python will always use Homebrew's version of Python. So you may end up with both copies on your machine anyways.

Generally speaking - if you're depending on the version of Python you install to not change until you want it to (e.g. for development purposes), I would advise against using Homebrew Python. It exists more to serve Homebrew/Homebrew packages that need it, and provide a REPL/sandbox once in a while.

See also - Homebrew Python is not for you.

[ghost]

Thank you for the super detailed explanation - I couldn't find anything related to this.

I'm sorry for the confusion, I don't have python installed via homebrew any longer. I removed it and installed python with pyenv yesterday. I was unaware of this information.

The tikinter library is a part of the python install and is installed at: /Users/john/.pyenv/versions/3.9.7/lib/python3.9/tkinter

/Users/john/.pyenv/versions/3.9.7/lib/python3.9/tkinter
/Users/john/.pyenv/versions/3.9.7/lib/python3.9/tkinter/__init__.py
/Users/john/.pyenv/versions/3.9.7/lib/python3.9/tkinter/__main__.py
/Users/john/.pyenv/versions/3.9.7/lib/python3.9/tkinter/__pycache__
/Users/john/.pyenv/versions/3.9.7/lib/python3.9/tkinter/colorchooser.py
/Users/john/.pyenv/versions/3.9.7/lib/python3.9/tkinter/commondialog.py
/Users/john/.pyenv/versions/3.9.7/lib/python3.9/tkinter/constants.py
/Users/john/.pyenv/versions/3.9.7/lib/python3.9/tkinter/dialog.py
/Users/john/.pyenv/versions/3.9.7/lib/python3.9/tkinter/dnd.py
/Users/john/.pyenv/versions/3.9.7/lib/python3.9/tkinter/filedialog.py
/Users/john/.pyenv/versions/3.9.7/lib/python3.9/tkinter/font.py
/Users/john/.pyenv/versions/3.9.7/lib/python3.9/tkinter/messagebox.py
/Users/john/.pyenv/versions/3.9.7/lib/python3.9/tkinter/scrolledtext.py
/Users/john/.pyenv/versions/3.9.7/lib/python3.9/tkinter/simpledialog.py
/Users/john/.pyenv/versions/3.9.7/lib/python3.9/tkinter/test
/Users/john/.pyenv/versions/3.9.7/lib/python3.9/tkinter/tix.py
/Users/john/.pyenv/versions/3.9.7/lib/python3.9/tkinter/ttk.py

I removed homebrew python because I didn't want duplicated python installs. I also have been seeing some python warnings about how brew has installed python. I installed it with pyenv and symlinked into /usr/local/Cellar/[email protected]/3.9.7

I don't have [email protected] installed in /usr/local/Cellar

I don't know how many tests have failed here or if testing was supposed to continue after this failure. It's not clear that other tests are being run after this that are passing. It looked like a total failed test not just one issue.

I tried to manually remove the tkinter library from my non-brew python install but that doesn't work. Didn't prevent this failed test

Is there a way to install python using pyenv without the tkinter library? I guess that would have to be using the package using flags - yuck.

[alebcay]

Yes, at this point it would probably be easier for you to just use pyenv's Python and whatever software you use in Homebrew, you install outside of Homebrew instead and somehow make it point to pyenv's Python.

Removing the tkinter library from pyenv's Python is probably non-trivial or gross as you mentioned.

I removed homebrew python because I didn't want duplicated python installs. I also have been seeing some python warnings about how brew has installed python.

FWIW this is related to deprecated behavior coming up in Python 3.10/recent versions of pip. The pip team decided to just add that warning message, Homebrew team has no way of suppressing it.

Homebrew team is aware that of the deprecation upstream, but so far there has yet to be a finalized resolution method provided from Python/pip upstream. So Homebrew team is in a bit of a weird spot where users are getting this warning but maintainers don't really have any actionable fix.

In any case, the breakage will occur in 3.12 so we're expecting to resolve this before then. This entire deprecation message is discussed/tracked in Homebrew/homebrew-core#76621.

[ghost]

A few brew packages are failing brew test and some processes are crashing when run. It looks like I need to create a symlink for certain frameworks to fix this... will research.

Error: mkvtomp4: failed
An exception occurred within a child process:
  BuildError: Failed executing: /usr/local/Cellar/mkvtomp4/2.0_2/bin/mkvtomp4 --help

Error: sphinx-doc: failed
An exception occurred within a child process:
  BuildError: Failed executing: /usr/local/Cellar/sphinx-doc/4.2.0/bin/sphinx-quickstart -pPorject -aAuthor -v1.0 -q /private/tmp/sphinx-doc-test-20210915-81047-12xiwy4
/usr/local/Homebrew/Library/Homebrew/formula.rb:2291:in `block in system'

Error: streamlink: failed
An exception occurred within a child process:
  BuildError: Failed executing: /usr/local/Cellar/streamlink/2.4.0/bin/streamlink https://vimeo.com/189776460 360p -o video.mp4
/usr/local/Homebrew/Library/Homebrew/formula.rb:2291:in `block in system'

Error: vapoursynth: failed
An exception occurred within a child process:
  BuildError: Failed executing: /usr/local/Cellar/vapoursynth/54/bin/vspipe --version
/usr/local/Homebrew/Library/Homebrew/formula.rb:2291:in `block in system'

Error: youtube-dl: failed
An exception occurred within a child process:
  BuildError: Failed executing: /usr/local/Cellar/youtube-dl/2021.6.6/bin/youtube-dl --simulate https://www.youtube.com/watch?v=pOtd1cbOP7k
/usr/local/Homebrew/Library/Homebrew/formula.rb:2291:in `block in system'

Error: mpv: failed
An exception occurred within a child process:
  BuildError: Failed executing: /usr/local/Cellar/mpv/0.33.1/bin/mpv --ao=null /usr/local/Homebrew/Library/Homebrew/test/support/fixtures/test.wav
/usr/local/Homebrew/Library/Homebrew/formula.rb:2291:in `block in system'

crash log for mpv

Dyld Error Message:
  dyld: Using shared cache: F0A21792-ED7E-33A3-A0DD-24B063378C1E
Library not loaded: /usr/local/opt/[email protected]/Frameworks/Python.framework/Versions/3.9/Python
  Referenced from: /usr/local/opt/vapoursynth/lib/libvapoursynth-script.0.dylib
  Reason: image not found

[ghost]

Where would I find the brew configuration information for building python for the brew install?

[carlocab]

Do you mean how Homebrew configures Python3? You can find it here: https://github.com/Homebrew/homebrew-core/blob/e79d8126370187be3bd7be6bdbffacf803732113/Formula/[email protected]

It seems to me a lot easier to live with a second Python installation (you actually have two more provided by your system...) than try to make the Python you've installed with pyenv replace Homebrew Python3.