Python: move expressions in python-modules to their own folders

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

@@ -0,0 +1,25 @@
+{ stdenv, buildPythonPackage, fetchurl
+, pytest, mock, pytestcov, coverage }:
+
+buildPythonPackage rec {
+  pname = "gunicorn";
+  version = "19.7.1";
+  name = "${pname}-${version}";
+
+  src = fetchurl {
+    url = "mirror://pypi/g/gunicorn/${name}.tar.gz";
+    sha256 = "eee1169f0ca667be05db3351a0960765620dad53f53434262ff8901b68a1b622";
+  };
+
+  buildInputs = [ pytest mock pytestcov coverage ];
+
+  prePatch = ''
+    substituteInPlace requirements_test.txt --replace "==" ">="
+  '';
+
+  meta = with stdenv.lib; {
+    homepage = http://pypi.python.org/pypi/gunicorn;
+    description = "WSGI HTTP Server for UNIX";
+    license = licenses.mit;
+  };
+}