Python: Difference between revisions

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First, make sure that you installed/added your module to python. Typically you would use something like <code> (python3.withPackages (ps: with ps; [ yourmodule ]))</code> in the list of installed applications.

Then, if you packaged yourself your application, make sure to use <code>buildPythonPackage</code> and **not** <code>buildPythonApplication</code> or <code>stdenv.mkDerivation</code>. The reason is that <code>python3.withPackages</code> [https://github.com/NixOS/nixpkgs/blob/91d1eb9f2a9c4e3c9d68a59f6c0cada8c63d5340/pkgs/top-level/python-packages.nix#L57 filters] the packages to check that they are built using the appropriate python interpreter: this is done by verifying that the derivation has a < code>pythonModule</code> attribute and only buildPythonPackage [https://github.com/NixOS/nixpkgs/blob/91d1eb9f2a9c4e3c9d68a59f6c0cada8c63d5340/pkgs/top-level/python-packages.nix#L43 sets this value] (passthru [https://github.com/NixOS/nixpkgs/blob/91d1eb9f2a9c4e3c9d68a59f6c0cada8c63d5340/pkgs/top-level/python-packages.nix#L75 here]) thanks to, notably <code>passthru = { pythonModule = python; }</code>. If you used <code>stdenv.mkDerivation</code> then you can maybe set this value manually, but it's safer to simply use ~~instead~~ <code>buildPythonPackage {format = "other";}<code> instead of <code>mkDerivation</code>.

Then, if you packaged yourself your application, make sure to use <code>buildPythonPackage</code> and **not** <code>buildPythonApplication</code> or <code>stdenv.mkDerivation</code>. The reason is that <code>python3.withPackages</code> [https://github.com/NixOS/nixpkgs/blob/91d1eb9f2a9c4e3c9d68a59f6c0cada8c63d5340/pkgs/top-level/python-packages.nix#L57 filters] the packages to check that they are built using the appropriate python interpreter: this is done by verifying that the derivation has a <code>pythonModule</code> attribute and only buildPythonPackage [https://github.com/NixOS/nixpkgs/blob/91d1eb9f2a9c4e3c9d68a59f6c0cada8c63d5340/pkgs/top-level/python-packages.nix#L43 sets this value] (passthru [https://github.com/NixOS/nixpkgs/blob/91d1eb9f2a9c4e3c9d68a59f6c0cada8c63d5340/pkgs/top-level/python-packages.nix#L75 here]) thanks to, notably <code>passthru = { pythonModule = python; }</code>. If you used <code>stdenv.mkDerivation</code> then you can maybe set this value manually, but it's safer to simply use <code>buildPythonPackage {format = "other"; … your derivation …}</code> instead of <code>mkDerivation</code>.

== See also ==

@@ Line 450: / Line 450: @@
 First, make sure that you installed/added your module to python. Typically you would use something like <code> (python3.withPackages (ps: with ps; [ yourmodule ]))</code> in the list of installed applications.
-Then, if you packaged yourself your application, make sure to use <code>buildPythonPackage</code> and **not** <code>buildPythonApplication</code> or <code>stdenv.mkDerivation</code>. The reason is that <code>python3.withPackages</code> [https://github.com/NixOS/nixpkgs/blob/91d1eb9f2a9c4e3c9d68a59f6c0cada8c63d5340/pkgs/top-level/python-packages.nix#L57 filters] the packages to check that they are built using the appropriate python interpreter: this is done by verifying that the derivation has a < code>pythonModule</code> attribute and only buildPythonPackage [https://github.com/NixOS/nixpkgs/blob/91d1eb9f2a9c4e3c9d68a59f6c0cada8c63d5340/pkgs/top-level/python-packages.nix#L43 sets this value] (passthru [https://github.com/NixOS/nixpkgs/blob/91d1eb9f2a9c4e3c9d68a59f6c0cada8c63d5340/pkgs/top-level/python-packages.nix#L75 here]) thanks to, notably <code>passthru = { pythonModule = python; }</code>. If you used <code>stdenv.mkDerivation</code> then you can maybe set this value manually, but it's safer to simply use instead <code>buildPythonPackage  {format = "other";}<code> instead of <code>mkDerivation</code>.
+Then, if you packaged yourself your application, make sure to use <code>buildPythonPackage</code> and **not** <code>buildPythonApplication</code> or <code>stdenv.mkDerivation</code>. The reason is that <code>python3.withPackages</code> [https://github.com/NixOS/nixpkgs/blob/91d1eb9f2a9c4e3c9d68a59f6c0cada8c63d5340/pkgs/top-level/python-packages.nix#L57 filters] the packages to check that they are built using the appropriate python interpreter: this is done by verifying that the derivation has a <code>pythonModule</code> attribute and only buildPythonPackage [https://github.com/NixOS/nixpkgs/blob/91d1eb9f2a9c4e3c9d68a59f6c0cada8c63d5340/pkgs/top-level/python-packages.nix#L43 sets this value] (passthru [https://github.com/NixOS/nixpkgs/blob/91d1eb9f2a9c4e3c9d68a59f6c0cada8c63d5340/pkgs/top-level/python-packages.nix#L75 here]) thanks to, notably <code>passthru = { pythonModule = python; }</code>. If you used <code>stdenv.mkDerivation</code> then you can maybe set this value manually, but it's safer to simply use <code>buildPythonPackage  {format = "other"; … your derivation …}</code> instead of <code>mkDerivation</code>.
 == See also ==