Packaging/Python: Difference between revisions

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Line 32:

let

pkgs = import nixpkgs { inherit system; };

~~xacro~~ = pkgs.python3Packages.callPackage ./derivation.nix {

# replace ./derivation.nix with the path (relative to this file) to your derivation

mypackage = pkgs.python3Packages.callPackage ./derivation.nix {

lib = pkgs.lib;

};

in {

~~devShells~~.default = pkgs.~~mkShell {~~

packages.default = pkgs.python3.withPackages(_: [ mypackage ]);

~~buildInputs =~~ [ ~~pkgs.python3 xacro~~ ];

};

});

}

</syntaxhighlight>Replace "mypackage" with your package name. Then, ~~enter~~ the ~~devShell and launch~~ a ~~Python~~ REPL:<syntaxhighlight lang="shell-session">

</syntaxhighlight>Replace "mypackage" with your package name. Then, run the flake to get into a python REPL with your package, ready to be imported:<syntaxhighlight lang="shell-session">

$ nix ~~develop~~

$ nix run

~~$ python~~

Python 3.11.10 (main, Sep 7 2024, 01:03:31) [GCC 13.2.0] on linux

Type "help", "copyright", "credits" or "license" for more information.

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== Pip and Virtualenv enabled nix-shell ==

It might be the case that you simply need to prototype fast small projects with <code>pip</code> and <code>virtualenv</code> without the need for relying on the dependencies being already packaged in nixpkgs.

{{~~Notice~~|Keep in mind that the virtualenv symlinks will be invalidated if you update your system!||

{{Note|Keep in mind that the virtualenv symlinks will be invalidated if you update your system!}}

For a local working python environment you can use the following <code>shell.nix</code><ref>https://groups.google.com/forum/#!topic/nix-devel/3qPfwCAV3GE</ref>.

@@ Line 32: / Line 32: @@
        let
          pkgs = import nixpkgs { inherit system; };
-         xacro = pkgs.python3Packages.callPackage ./derivation.nix {
+         # replace ./derivation.nix with the path (relative to this file) to your derivation
+        mypackage = pkgs.python3Packages.callPackage ./derivation.nix {
            lib = pkgs.lib;
          };
        in {
-         devShells.default = pkgs.mkShell {
+         packages.default = pkgs.python3.withPackages(_: [ mypackage ]);
-          buildInputs = [ pkgs.python3 xacro ];
-        };
        });
 }
-</syntaxhighlight>Replace "mypackage" with your package name. Then, enter the devShell and launch a Python REPL:<syntaxhighlight lang="shell-session">
+</syntaxhighlight>Replace "mypackage" with your package name. Then, run the flake to get into a python REPL with your package, ready to be imported:<syntaxhighlight lang="shell-session">
-$ nix develop
+$ nix run
-$ python
 Python 3.11.10 (main, Sep  7 2024, 01:03:31) [GCC 13.2.0] on linux
 Type "help", "copyright", "credits" or "license" for more information.
@@ Line 51: / Line 49: @@
 == Pip and Virtualenv enabled nix-shell ==
 It might be the case that you simply need to prototype fast small projects with <code>pip</code> and <code>virtualenv</code> without the need for relying on the dependencies being already packaged in nixpkgs.
-{{Notice|Keep in mind that the virtualenv symlinks will be invalidated if you update your system!||
+{{Note|Keep in mind that the virtualenv symlinks will be invalidated if you update your system!}}
 For a local working python environment you can use the following <code>shell.nix</code><ref>https://groups.google.com/forum/#!topic/nix-devel/3qPfwCAV3GE</ref>.