pythonPackages.cloudpickle: Move to own file

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

@@ -0,0 +1,27 @@
+{ stdenv, buildPythonPackage, fetchPypi, pytest, mock }:
+
+buildPythonPackage rec {
+  pname = "cloudpickle";
+  version = "0.2.2";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "0x4fbycipkhfax7lydaxcnc14g42g274qba17j51shr5gbq6m8lx";
+  };
+
+  buildInputs = [ pytest mock ];
+
+  # See README for tests invocation
+  checkPhase = ''
+    PYTHONPATH=$PYTHONPATH:'.:tests' py.test
+  '';
+
+  # TypeError: cannot serialize '_io.FileIO' object
+  doCheck = false;
+
+  meta = with stdenv.lib; {
+    description = "Extended pickling support for Python objects";
+    homepage = https://github.com/cloudpipe/cloudpickle;
+    license = with licenses; [ bsd3 ];
+  };
+}