anchor.diff:  
   buildPythonPackage rec {
     pname = "gremlinpython";
  -  version = "3.4.10";
  +  version = "3.5.1";
   
     # pypi tarball doesn't include tests
     src = fetchFromGitHub {
       owner = "apache";
       repo = "tinkerpop";
       rev = version;
  -    sha256 = "0i9lkrwbsmpx1h9480vf97pibm2v37sgw2qm2r1c0i8gg5bcmhj3";
  +    sha256 = "1vlhxq0f2hanhkv6f17dxgbwr7gnbnh1kkkq0lxcwkbm2l0rdrlr";
     };
  -  sourceRoot = "source/gremlin-python/src/main/jython";
  +  sourceRoot = "source/gremlin-python/src/main/python";
     postPatch = ''
       substituteInPlace setup.py \
         --replace 'aenum>=1.4.5,<3.0.0' 'aenum' \
  -      --replace 'tornado>=4.4.1,<6.0' 'tornado' \
  +      --replace 'aiohttp>=3.7.0,<=3.7.4' 'aiohttp' \
         --replace 'PyHamcrest>=1.9.0,<2.0.0' 'PyHamcrest' \
         --replace 'radish-bdd==0.8.6' 'radish-bdd' \
         --replace 'mock>=3.0.5,<4.0.0' 'mock' \
  
positive.code: , buildPythonPackage
  , fetchFromGitHub
  , aenum
  , importlib-metadata
  , isodate
  , six
  , tornado
  , pytestCheckHook
  , mock
  , pyhamcrest
  
negative.code:   ];
    propagatedBuildInputs = [
      aenum
      aiohttp
      isodate
      nest-asyncio
      six
    ];
  
    checkInputs = [
  