anchor.diff:  , pythonOlder
   , fetchFromGitHub
   , anyio
  +, certifi
   , h11
   , h2
   , pproxy
   , pytest-asyncio
   , pytestCheckHook
   , pytest-cov
  +, pytest-httpbin
   , sniffio
   , trio
   , trustme
  
positive.code: 
  buildPythonPackage rec {
    pname = "httpcore";
    version = "0.13.7";
    disabled = pythonOlder "3.6";
  
    src = fetchFromGitHub {
      owner = "encode";
      repo = pname;
      rev = version;
      sha256 = "sha256-9hG9MqqEYMT2j7tXafToGYwHbJfp9/klNqZozHSbweE=";
    };
  
    propagatedBuildInputs = [
      anyio
      h11
      h2
      sniffio
  
negative.code:     pytest-asyncio
      pytestCheckHook
      pytest-cov
      pytest-httpbin
      trio
      trustme
      uvicorn
    ];
  
    pythonImportsCheck = [ "httpcore" ];
  