python.pkgs.numtraits: move expression

pkgs/development/python-modules/numtraits/default.nix

@@ -0,0 +1,33 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, pytest
+, six
+, numpy
+, traitlets
+}:
+
+buildPythonPackage rec {
+  pname = "numtraits";
+  version = "0.2";
+  name = "${pname}-${version}";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "2fca9a6c9334f7358ef1a3e2e64ccaa6a479fc99fc096910e0d5fbe8edcdfd7e";
+  };
+
+  checkInputs = [ pytest ];
+  propagatedBuildInputs = [ six numpy traitlets];
+
+  checkPhase = ''
+    py.test
+  '';
+
+  meta = {
+    description = "Numerical traits for Python objects";
+    license = lib.licenses.bsd2;
+    maintainers = with lib.maintainers; [ fridh ];
+    homepage = https://github.com/astrofrog/numtraits;
+  };
+}