Add libyaml and PyYAML.

svn path=/nixpkgs/trunk/; revision=19477

pkgs/top-level/python-packages.nix

@@ -409,6 +409,24 @@ rec {
     };
   });
 
+  pyyaml = buildPythonPackage (rec {
+    name = "PyYAML-3.09";
+
+    src = fetchurl {
+      url = "http://pyyaml.org/download/pyyaml/PyYAML-3.09.zip";
+      sha256 = "204aca8b42dbe90e460794d743dd16182011da85507bfd4f092f9f76e0688040";
+    };
+
+    buildInputs = [ pkgs.unzip pkgs.pyrex ];
+    propagatedBuildInputs = [ pkgs.libyaml ];
+
+    meta = {
+      description = "The next generation YAML parser and emitter for Python";
+      homepage = http://pyyaml.org;
+      license = "free"; # !?
+    };
+  });
+
   setuptoolsDarcs = buildPythonPackage {
     name = "setuptools-darcs-1.2.8";