anchor.diff:  , measurement
   , python-dateutil
   , requests
  -, six
   , rich
   , pytestCheckHook
   , mock
   , nose
  +, pythonOlder
   }:
   
   # TODO: Define this package in "all-packages.nix" using "toPythonApplication".
  
positive.code:   pname = "myfitnesspal";
    version = "1.17.0";
    format = "setuptools";
  
    src = fetchPypi {
      inherit pname version;
  
negative.code:     measurement
      python-dateutil
      requests
      rich
    ];
  
  