anchor.diff:  , isPy27
   , numpy
   , scikitlearn
  +, pytestCheckHook
   , pytorch
   , torchvision
   , tqdm
  
positive.code:     tqdm
    ];
  
    meta = {
      description = "Metric learning library for PyTorch";
      homepage = "https://github.com/KevinMusgrave/pytorch-metric-learning";
  
negative.code: 
  buildPythonPackage rec {
    pname   = "pytorch-metric-learning";
    version = "0.9.94";
  
    disabled = isPy27;
  
    src = fetchFromGitHub {
      owner = "KevinMusgrave";
      repo = pname;
      rev = "v${version}";
      sha256 = "1i2m651isa6xk3zj8dhzdbmd1bdzl51bh6rxifx6gg22hfa5dj9a";
    };
  
    propagatedBuildInputs = [
  