anchor.diff:        homepage = "http://matplotlib.sourceforge.net/";
         platforms = stdenv.lib.platforms.linux;
         maintainers = [ stdenv.lib.maintainers.simons ];
  +    };
  +  });
  +
  +
  +  mccabe = buildPythonPackage (rec {
  +    name = "mccabe-0.2";
  +
  +    src = fetchurl {
  +      url = "http://pypi.python.org/packages/source/m/mccabe/${name}.tar.gz";
  +      md5 = "c1012c7c24081471f45aab864d4e3805";
  +    };
  +
  +    buildInputs = [ ];
  +
  +    meta = {
  +      description = "McCabe checker, plugin for flake8";
  +      homepage = "https://github.com/flintwork/mccabe";
  +      license = pkgs.lib.licenses.mit;
  +      maintainers = [ stdenv.lib.maintainers.garbas ];
       };
     });
   
  
positive.code: 
    pep8 = buildPythonPackage rec {
      name = "pep8-${version}";
      version = "1.3.3";
  
      src = fetchurl {
        url = "http://pypi.python.org/packages/source/p/pep8/${name}.tar.gz";
        md5 = "093a99ced0cc3b58c01549d7350f5a73";
      };
  
      meta = {
        homepage = http://pypi.python.org/pypi/pep8/;
        description = "Python style guide checker";
        license = pkgs.lib.licenses.mit;
      };
    };
  
  
negative.code:     meta = {
        homepage = "http://home.blarg.net/~steveha/pyfeed.html";
        description = "Tools for syndication feeds";
      };
    };
  
    pyflakes = buildPythonPackage rec {
      name = "pyflakes-0.6.1";
  
      src = fetchurl {
        url = "http://pypi.python.org/packages/source/p/pyflakes/${name}.tar.gz";
        md5 = "00debd2280b962e915dfee552a675915";
      };
  
      buildInputs = [ unittest2 ];
  
      meta = {
        homepage = "https://launchpad.net/pyflakes";
        description = "A simple program which checks Python source files for errors.";
        license = pkgs.lib.licenses.mit;
        maintainers = [ stdenv.lib.maintainers.garbas ];
      };
    };
  
  