anchor.diff:      typing-extensions
       urwid
       watchdog
  +  ] ++ lib.optionals (pythonOlder "3.7") [
  +    dataclasses
     ];
   
     postInstall = ''
  
positive.code:     pytestCheckHook
    ];
  
    pythonImportsCheck = [ "bpython" ];
  
    meta = with lib; {
      description = "A fancy curses interface to the Python interactive interpreter";
  
negative.code: buildPythonPackage rec {
    pname = "bpython";
    version = "0.22.1";
    format = "setuptools";
  
    disabled = pythonOlder "3.6";
  
    src = fetchPypi {
      inherit pname version;
      hash = "sha256-H7HgpSMyV5/E49z3XiF5avZ6rivkYBeez8zpUwpJogA=";
    };
  
    propagatedBuildInputs = [
  