Python: Difference between revisions
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Python applications instead should be referenced directly from <code>pkgs/top-level/all-packages.nix</code>. | Python applications instead should be referenced directly from <code>pkgs/top-level/all-packages.nix</code>. | ||
The expression should take <code>pythonPackages</code> as one of the arguments, which guarantees that packages belong to the same set. | The expression should take <code>pythonPackages</code> as one of the arguments, which guarantees that packages belong to the same set. For example: | ||
<syntaxhighlight lang="nix"> | |||
{ lib | |||
, pythonPackages | |||
}: | |||
with pythonPackages; | |||
buildPythonApplication rec { | |||
# ... | |||
</syntaxhighlight> | |||
= External Documentation = | = External Documentation = | ||
* [https://nixos.org/nixpkgs/manual/#python Python user guide in nixpkgs manual] | * [https://nixos.org/nixpkgs/manual/#python Python user guide in nixpkgs manual] | ||
Revision as of 15:37, 26 February 2018
Contribution guidelines
Libraries
According to the official guidelines for python new package expressions for libraries should be placed in pkgs/development/python-modules/<name>/default.nix. Those expressions are then referenced from pkgs/top-level/python-packages.nix like in this example:
{
aenum = callPackage ../development/python-modules/aenum { };
}
The reasoning behind this is the large size of pkgs/top-level/python-packages.nix. Unfortunately most libraries are still defined in-place in pkgs/top-level/python-packages.nix. If a change to library is necessary or an update is made, it is recommend to move the modified package out of pkgs/top-level/python-packages.nix.
Applications
Python applications instead should be referenced directly from pkgs/top-level/all-packages.nix.
The expression should take pythonPackages as one of the arguments, which guarantees that packages belong to the same set. For example:
{ lib
, pythonPackages
}:
with pythonPackages;
buildPythonApplication rec {
# ...