anchor.diff:      };
     };
   
  +  turses = buildPythonPackage (rec {
  +    name = "turses-0.2.5";
  +
  +    src = fetchurl {
  +      url = "http://pypi.python.org/packages/source/t/turses/${name}.tar.gz";
  +      sha256 = "fbbc0ca93324535bcafa8434395caded8047e40c25d7a4004806415dd6ca023f";
  +    };
  +
  +    propagatedBuildInputs = [ oauth2 urwid tweepy ];
  +    doCheck = false;
  +
  +    meta = {
  +      homepage = "https://github.com/alejandrogomez/turses";
  +      description = "A Twitter client for the console.";
  +      license = pkgs.lib.licenses.gpl3;
  +      maintainers = [ stdenv.lib.maintainers.garbas ];
  +      platforms = stdenv.lib.platforms.linux;
  +    };
  +  });
  +
  +  tweepy = buildPythonPackage (rec {
  +    name = "tweepy-1.11";
  +
  +    src = fetchurl {
  +      url = "http://pypi.python.org/packages/source/t/tweepy/${name}.tar.gz";
  +      sha256 = "2b9fa225e9254e2cbbb01e59c6e92d9c42e5d41d97e8c74dee93eb09babffde5";
  +    };
  +
  +    doCheck = false;
  +
  +    meta = {
  +      homepage = "https://github.com/tweepy/tweepy";
  +      description = "Twitter library for python";
  +      license = pkgs.lib.licenses.mit;
  +      maintainers = [ stdenv.lib.maintainers.garbas ];
  +      platforms = stdenv.lib.platforms.linux;
  +    };
  +  });
  +
     twisted = buildPythonPackage rec {
       name = "twisted-10.2.0";
   
  
positive.code: 
  
    httplib2 = buildPythonPackage rec {
      name = "httplib2-0.6.0";
  
      src = fetchurl {
        url = "http://httplib2.googlecode.com/files/${name}.tar.gz";
        sha256 = "134pldyxayc0x4akzzvkciz2kj1w2dsim1xvd9b1qrpmba70dpjq";
      };
  
      doCheck = false; # doesn't have a test
  
      meta = {
        homepage = http://code.google.com/p/httplib2/;
        description = "A comprehensive HTTP client library";
      };
    };
  
  
negative.code:     };
    });
  
    oauth2 = buildPythonPackage (rec {
      name = "auth2-1.5.211";
  
      src = fetchurl {
        url = "http://pypi.python.org/packages/source/o/oauth2/oauth2-1.5.211.tar.gz";
        sha256 = "82a38f674da1fa496c0fc4df714cbb058540bed72a30c50a2e344b0d984c4d21";
      };
  
      propagatedBuildInputs = [ httplib2  ];
      doCheck = false;
  
      meta = {
        homepage = "https://github.com/simplegeo/python-oauth2";
        description = "library for OAuth version 1.0";
        license = pkgs.lib.licenses.mit;
        maintainers = [ stdenv.lib.maintainers.garbas ];
        platforms = stdenv.lib.platforms.linux;
      };
    });
  
    optfunc = buildPythonPackage ( rec {
      name = "optfunc-git";
  
  