pythonPackages.ruamel_yaml: refactor move to python-modules

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

@@ -0,0 +1,31 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+, ruamel_base
+, typing
+, ruamel_ordereddict
+, isPy3k
+}:
+
+buildPythonPackage rec {
+  pname = "ruamel.yaml";
+  version = "0.15.35";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0xggyfaj6vprggahf7cq8kp9j79rb7hn8ndk3bxj2sxvwhhliiwd";
+  };
+
+  # Tests cannot load the module to test
+  doCheck = false;
+
+  propagatedBuildInputs = [ ruamel_base typing ]
+    ++ stdenv.lib.optional (!isPy3k) ruamel_ordereddict;
+
+  meta = with stdenv.lib; {
+    description = "YAML parser/emitter that supports roundtrip preservation of comments, seq/map flow style, and map key order";
+    homepage = https://bitbucket.org/ruamel/yaml;
+    license = licenses.mit;
+  };
+
+}