anchor.diff:      };
     };
   
  +
     moreItertools = buildPythonPackage rec {
       name = "more-itertools-2.2";
   
  
positive.code:     };
    };
  
    funcy = buildPythonPackage rec {
      name = "funcy-1.4";
  
      src = pkgs.fetchurl {
          url = "https://github.com/Suor/funcy/archive/1.4.tar.gz";
          sha256 = "694e29aa67d03a6ab006f1854740b65f4f87e581afb33853f80e647ddb5f24e7";
      };
  
      meta = with stdenv.lib; {
        description = "Collection of fancy functional tools focused on practicality.";
        homepage = "http://funcy.readthedocs.org/";
        license = stdenv.lib.licenses.bsd3;
      };
    };
  
  
  }); in pythonPackages
  
negative.code:     };
    };
  
  
    uncertainties = buildPythonPackage rec {
      name = "uncertainties-2.4.6.1";
  
  