{ lib
, buildPythonPackage
, isPy27
, fetchFromGitHub
, fetchpatch
, pytestCheckHook
, unittest2
, future
, numpy
, pillow
, scipy
, scikitlearn
, scikitimage
, threadpoolctl
}:

buildPythonPackage rec {
  pname = "batchgenerators";
  version = "0.20.1";

  disabled = isPy27;

  src = fetchFromGitHub {
    owner = "MIC-DKFZ";
    repo = pname;
    rev = "v${version}";
    sha256 = "1f91yflv9rschyl5bnfn735hp1rxrzcxkx18aajmlzb067h0ip8m";

  };

  patches = [
    # lift Pillow bound; should be merged in next release
    (fetchpatch {
      url = "https://github.com/MIC-DKFZ/batchgenerators/pull/59.patch";
      sha256 = "171b3dm40yn0wi91m9s2nq3j565s1w39jpdf1mvc03rn75i8vdp0";
    })
  ];

  propagatedBuildInputs = [
    future numpy pillow scipy scikitlearn scikitimage threadpoolctl
  ];

  checkInputs = [ pytestCheckHook unittest2 ];

  meta = {
    description = "2D and 3D image data augmentation for deep learning";
    homepage = "https://github.com/MIC-DKFZ/batchgenerators";
    license = lib.licenses.asl20;
    maintainers = with lib.maintainers; [ bcdarwin ];
  };
}