yyuu/pyenv

Simple Python version management

Burak Can Kahraman

@burakcank

No I do actually have pip, not the symlink but that's the way to go for you apparently.

Kent Brockman

@KentBrockman

alright

Philippe Ombredanne

@pombredanne

Yan Wong

@hyanwong

I'm trying to run a python version within the gdb debugger, that's been compiled by pyenv on OS X with the --debug flag: pyenv install --debug 3.9-dev. But when I run sudo gdb /path/to/.pyenv/versions/3.9-dev-debug/bin/python3.9d I get

Reading symbols from /path/to/.pyenv/versions/3.9-dev-debug/bin/python3.9d...

warning: `/private/var/folders/00/l36df9q14hv13hhw8wglncch0000gr/T/python-build.20201201132008.47447/Python-3.9-dev/Programs/python.o': can't open to read symbols: No such file or directory.

warning: Could not open OSO archive file "/private/var/folders/00/l36df9q14hv13hhw8wglncch0000gr/T/python-build.20201201132008.47447/Python-3.9-dev/libpython3.9d.a"
(No debugging symbols found in /path/to/.pyenv/versions/3.9-dev-debug/bin/python3.9d)

Is this possible - I can't find any information on the web about how to do this using pyenv-installed python binaries?

dennisetiawan23

@dennisetiawan23

Hello , i want to install pyenv in my school server directories

but i dont have apt-get, or curl, and sudo access

is this possible?

Philippe Ombredanne

@pombredanne

@dennisetiawan23 this is a local, user-only install

as long as you have the essential build and toolchain parts already installed (as well as a few common basics like zlib, bzip2, xz and a few similar)

Try it :)

@hyanwong if I were trying to debug a Python interpreter, I would likely build myself

Yan Wong

@hyanwong

Thanks. I resorted to that, but it would be nice not to have to!

Philippe Ombredanne

@pombredanne

@hyanwong that's IMHO a too exotic and rare a use case to ever support this

If you are in a state advanced enough that you are debugging an interpreter, you should not need any of pyenv IMHO

Dilum Aluthge

@DilumAluthge

I'm trying to build Python 3.8.6 with Framework support on macOS, and it is trying to write to /Applications. Can I instead write to a different folder, e.g. ~/Applications or something like that?

I found this issue (pyenv/pyenv#1468) with the same request, but there is no answer there.

Nafiul Islam

@gamesbrainiac_twitter

Folks, any idea when python 3.10a6 is going to be installable?

Chris Barnes

@clbarnes

when this PR is merged pyenv/pyenv#1839

Ryan Delaney

@rpdelaney

pyenv builds break when the PYENV_ROOT path contains whitespace. Known issue?

I get the (arguably unhelpful) error that "C compiler cannot create executables"

Ryan Delaney

@rpdelaney

I am not confident I can exhaustively search the closed issues to confirm there is nothing about this in there, but if folks here think it's a bug then I will file one

Ryan Delaney

@rpdelaney

Is it possible that this bug is with python? I have not attempted to build python except with pyenv

Philippe Ombredanne

@pombredanne

@rpdelaney Python never liked spaces in the install path

in general I would strongly discourage spaces in any paths :)

Ryan Delaney

@rpdelaney

Yeah, unfortunately macOS defaults don't follow this

Jerry Morrison

@1fish2

An empty path element can also cause build errors that are hard to debug, e.g. from a startup script that does export CPATH=foo/include:$CPATH before $CPATH gets set.

It'd save a lot of debugging headaches if pyenv checked for bad paths, libraries required to build python that are missing from the paths, and other known problems.

Philippe Ombredanne

@pombredanne

@1fish2 is this something you would know how to code?

Jerry Morrison

@1fish2

@pombredanne I'm happy to help but this looks beyond my bash skills, pyenv/plugins/python-build/bin/python-build?

Ryan Delaney

@rpdelaney

I'm reasonably comfortable in bash. If someone can point me in a direction I might be able to at least add a check for paths containing whitespace, newlines, or glob characters

Although the latter is somewhat dependent on shell settings

I'd suggest simply printing a warning message that the build may fail in case this behavior ever changes upstream

Jerry Morrison

@1fish2

I dug up some history on that empty path element problem.

Reasonable-looking shell startup code export C_INCLUDE_PATH="${C_INCLUDE_PATH}:${TEAM_HOME}/usr/local/include" ran before anything set C_INCLUDE_PATH, thus setting it to :/share/team/usr/local/include". gcc interprets that as .:/share/team/usr/local/include" which loaded the wrong include file and led to an obscure error message.

Mark Harris

@SiliconMeeple

Hopefully this will sound familiar to someone. I had pyenv installed on ubuntu 20.04 (probably), and a number of successful very usable python installations. I've since updated to 20.10 (or possibly done something else) and now python install anything fails with the below error message.
I've re-installed pyenv via brew and checked that I've got all the listed python build dependencies (https://github.com/pyenv/pyenv/wiki#suggested-build-environment).
Unfortunately, every time I run python install for any version, it fails with the following error.
Any thoughts or advice on how to fix or troubleshoot the problem would be gratefully received:


Downloading Python-3.6.11.tar.xz...
-> https://www.python.org/ftp/python/3.6.11/Python-3.6.11.tar.xz
Installing Python-3.6.11...

BUILD FAILED (Ubuntu 20.10 using python-build 20180424)

# ... snipped to last few loglines:

    esac; \
     ./python -E -m ensurepip \
        $ensurepip --root=/ ; \
fi
Aborted (core dumped)
make: *** [Makefile:1102: install] Error 134

Philippe Ombredanne

@pombredanne

:| weird for sure

@SiliconMeeple pyenv/pyenv#1621 ?

Mark Harris

@SiliconMeeple

Following the advice there fixed it! Thank you very much. :-)

Philippe Ombredanne

@pombredanne

:+1:

Jon Crall

@Erotemic

Is there any way to use pyenv (or some other tool) to fetch precompiled python binaries for specific versions? I'm trying to replace conda in my workflow, and the compile time of pyenv is currently a limiting factor in how fast I can setup a machine. Any tips?

Philippe Ombredanne

@pombredanne

@Erotemic pyenv only and exclusively builds from sources.
You want to look for prebuilt binary packages instead of pyenv (or build your own) ... which OS?

Jon Crall

@Erotemic

Ideally, any modern 64 bit OS, but it would be fine with just x86_64 linux. One of the use cases is that I'm trying to walk non-technical users through installing a Python application. They don't have much patience for compiling code, and sometimes they don't even have the ability to use sudo to install the deps like build-essential. I was using conda to achieve this, but they've changed their license such that it makes it hard to provide a reliable and truly FOSS solution. The other use case that I mentioned is just setting up a machine quickly without having to compile (and pgo optimize) python. (Maybe there is a way to use Conan to do this? I'm not super familiar with the system, so I'm not sure exactly what you can do with it).

ashwinvis

@ashwinvis:matrix.org

[m]

I made this pyenv plugin recently, which could be useful if you use pyenv-virtualenv and wish to upgrade your virtual environments to a different Python compiler version https://github.com/ashwinvis/pyenv-virtualenv-migrate/. Feedback welcome 🙂

Philippe Ombredanne

@pombredanne

@Erotemic
The first thing that comes to mind as you seem to be on some Debian linux or derivative (you mentioned buidl-essential) would be the deadsnakes PPA https://launchpad.net/~deadsnakes to get a binary Python package for a given Python version. This would require sudo though.

The second thing that comes to mind in your case and that could be Linux-distro independent would be AppImage, but that might imply you may need to do the packaging in the first place? there may be some Python appimages to reuse.

https://appimage.org/ and https://appimage.github.io/apps/ ?

Snaps and flatpack are of the same style.

AppImage does NOT require root

Jon Crall

@Erotemic

It is important that I don't require sudo (getting sysadmin to install things I need on computers is a huge pain, my life becomes much easier if I can bypass this). I did not know about AppImage, that looks like it might work.

Philippe Ombredanne

@pombredanne

@Erotemic there are pretty awesome. Linus picked that for installation of his dive log app
https://subsurface.github.io/download/

Jon Crall

@Erotemic

@pombredanne would it be possible to modify pyenv such that it can use the python-appimage? The idea being that could pyenv install python-appimage-3.9 and then get an appropriate folder in ~/.pyenv/versions? Is there any mechanism to expose the shared library with app-image? IIUC, there would be no way to build or use a c-extension-module with python-appimage that requires loading symbols from the libpython.so, correct?

kevaad

@kevaad:matrix.org

[m]

Hello everyone. I have problem with my python symlink after activating new venv with pyenv.

❯ which python
/usr/bin/python
❯ python -V
Python 3.9.4
❯ which pyenv
/home/vicky/.pyenv/bin/pyenv
❯ pyenv versions
* system (set by /home/vicky/.pyenv/version)
  3.8.9
❯ pyenv which python
/usr/bin/python
❯ pyenv global
system
❯ pyenv global 3.8.9
❯ pyenv global
3.8.9
❯ which python
/usr/bin/python
❯ pyenv which python
/home/vicky/.pyenv/versions/3.8.9/bin/python

As you see, I still get my original system python version when I do which python even after activating 3.8.9. Can anyone help?

thanks in advance

I'm on Ubuntu 21.04 and default python version is 3.9.4

I have installed python-is-python3 package to get around using python instead of python3

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