pythonPackages.ipaddress: refactor move to python-modules

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

@@ -0,0 +1,27 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+, pythonAtLeast
+, python
+}:
+
+if (pythonAtLeast "3.3") then null else buildPythonPackage rec {
+  pname = "ipaddress";
+  version = "1.0.18";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "1q8klj9d84cmxgz66073x1j35cplr3r77vx1znhxiwl5w74391ax";
+  };
+
+  checkPhase = ''
+    ${python.interpreter} test_ipaddress.py
+  '';
+
+  meta = with stdenv.lib; {
+    description = "Port of the 3.3+ ipaddress module to 2.6, 2.7, and 3.2";
+    homepage = https://github.com/phihag/ipaddress;
+    license = licenses.psfl;
+  };
+
+}