pythonPackages.geoalchemy2: refactor move to python-modules

pkgs/development/python-modules/geoalchemy2/default.nix

@@ -0,0 +1,25 @@
+{ stdenv
+, buildPythonPackage
+, fetchPypi
+, sqlalchemy
+, shapely
+}:
+
+buildPythonPackage rec {
+  pname = "GeoAlchemy2";
+  version = "0.3.0";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0p2h1kgl5b0jz8wadx485vjh1mmm5s67p71yxh9lhp1441hkfswf";
+  };
+
+  propagatedBuildInputs = [ sqlalchemy shapely ];
+
+  meta = with stdenv.lib; {
+    homepage =  http://geoalchemy.org/;
+    license = licenses.mit;
+    description = "Toolkit for working with spatial databases";
+  };
+
+}