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| Line 19: |
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| Then run <code>nix-shell</code> to use the shell. | | Then run <code>nix-shell</code> to use the shell. |
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| == Development shell ==
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| When you want to install Python only for a specific project you can use a [[Development environment with nix-shell|Development shell]].
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| If you only need Python you can put the following in your <code>shell.nix</code>:
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| <syntaxHighlight lang="nix">
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| # shell.nix
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| { pkgs ? import <nixpkgs> {} }:
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| let
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| my-python-packages = ps: with ps; [
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| pandas
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| requests
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| # other python packages
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| ];
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| my-python = pkgs.python3.withPackages my-python-packages;
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| in my-python.env
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| </syntaxHighlight>
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| However, if you already have a <code>shell.nix</code> with other packages, you can add python like this:
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|
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| <syntaxHighlight lang="nix">
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| # ...
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| pkgs.mkShell {
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| packages = [
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| # ...
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| (python3.withPackages my-python-packages) # we have defined this in the installation section
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| ];
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| }
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| </syntaxHighlight>
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| == Using alternative packages == | | == Using alternative packages == |