Python: Difference between revisions
TobiasBora (talk | contribs) →Using nix-ld: Explain how to use python with a venv |
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]; | ]; | ||
} | } | ||
</syntaxhighlight>Then, you can use your own pythonld in a specific virtual env like:<syntaxhighlight lang=" | </syntaxhighlight>Then, you can use your own pythonld in a specific virtual env like:<syntaxhighlight lang="console"> | ||
$ pythonld -m venv myvenv | $ pythonld -m venv myvenv | ||
$ source myvenv/bin/activate | |||
$ pip install … | |||
$ python | |||
… this python has dependencies installed via pip installed … | |||
</syntaxhighlight>If you want to also install system-wide nix dependencies like numpy so that you don't need to reinstall them in every venv, you can also install them system-wide via:<syntaxhighlight lang="nix"> | |||
{ | |||
programs.nix-ld = { | |||
enable = true; | |||
libraries = with pkgs; [ | |||
zlib zstd stdenv.cc.cc curl openssl attr libssh bzip2 libxml2 acl libsodium util-linux xz systemd | |||
]; | |||
}; | |||
# Usage: to create a venv, just do: | |||
# $ pythonld -m venv --system-site-packages myvenv | |||
# $ source myvenv/bin/activate | |||
# $ pip install … | |||
# https://github.com/nix-community/nix-ld?tab=readme-ov-file#my-pythonnodejsrubyinterpreter-libraries-do-not-find-the-libraries-configured-by-nix-ld | |||
# Important: don't forget the -a "$0" or venv will skip your wrapper. | |||
environment.systemPackages = [ | |||
(pkgs.writeShellScriptBin "pythonld" '' | |||
export LD_LIBRARY_PATH=$NIX_LD_LIBRARY_PATH | |||
exec -a "$0" ${(pkgs.python3.withPackages (ps: with ps; [ numpy ]))}/bin/python "$@" | |||
'') | |||
]; | |||
} | |||
</syntaxhighlight>And then use it like:<syntaxhighlight lang="console"> | |||
$ pythonld -m venv --system-site-packages myvenv | |||
$ source myvenv/bin/activate | $ source myvenv/bin/activate | ||
$ pip install … | $ pip install … | ||