Python: Difference between revisions

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$ uv python install 3.14 ~~--preview~~ --default

$ uv python install 3.14 --default

</syntaxhighlight>

~~You may want to set the <code>UV_PYTHON_DOWNLOADS=never</code> environment variable in your shell to stop uv from downloading Python binaries automatically if needed.~~ Setting <code>environment.localBinInPath = true;</code> is highly recommended, because uv will install binaries in <code>~/.local/bin</code>.

Setting <code>environment.localBinInPath = true;</code> is highly recommended, because uv will install binaries in <code>~/.local/bin</code>.

==== Python software development ====

Python is meant to be considered a ''development'' package. That said, avoid installing a ''system'' Python for developing on Python projects. Consider using Home Manager's [https://nix-community.github.io/home-manager/options/home-manager/programs/uv.html <code>programs.uv</code>] instead that does Python and Python tool installations with continuous, automatic updates.

==== ImportError: libstdc++.so.6 ====

If you hit the infamous <code>ImportError: libstdc++.so.6: cannot open shared object file: No such file or directory</code> error after installing a Python package make sure to configure <code>nix-ld</code> (see above) to patch packages that expect an [[wikipedia:Filesystem_Hierarchy_Standard|FHS compliant]] environment. See [https://painless.software/how-use-python-on-nixos-the-pythonic-way this blog post] for background reading.

=== Using poetry ===

@@ Line 403: / Line 403: @@
 <syntaxhighlight lang="console">
-$ uv python install 3.14 --preview --default
+$ uv python install 3.14 --default
 </syntaxhighlight>
-You may want to set the <code>UV_PYTHON_DOWNLOADS=never</code> environment variable in your shell to stop uv from downloading Python binaries automatically if needed. Setting <code>environment.localBinInPath = true;</code> is highly recommended, because uv will install binaries in <code>~/.local/bin</code>.
+Setting <code>environment.localBinInPath = true;</code> is highly recommended, because uv will install binaries in <code>~/.local/bin</code>.
+==== Python software development ====
+Python is meant to be considered a ''development'' package. That said, avoid installing a ''system'' Python for developing on Python projects. Consider using Home Manager's [https://nix-community.github.io/home-manager/options/home-manager/programs/uv.html <code>programs.uv</code>] instead that does Python and Python tool installations with continuous, automatic updates.
+==== ImportError: libstdc++.so.6 ====
+If you hit the infamous <code>ImportError: libstdc++.so.6: cannot open shared object file: No such file or directory</code> error after installing a Python package make sure to configure <code>nix-ld</code> (see above) to patch packages that expect an [[wikipedia:Filesystem_Hierarchy_Standard|FHS compliant]] environment. See [https://painless.software/how-use-python-on-nixos-the-pythonic-way this blog post] for background reading.
 === Using poetry ===