anchor.diff:      owner = "ikvk";
       repo = "imap_tools";
       rev = "v${version}";
  -    hash = "sha256-la2+cpTnHZQn/FXtySp+3zDCBTONiLC16Tm+hDiIERc=";
  +    hash = "sha256-RiKGxyCPYlAJ5YbxvEKxCYgUg1D9s29YSCT4tY3FIEE=";
     };
   
     checkInputs = [
  
positive.code: 
  buildPythonPackage rec {
    pname = "imap-tools";
    version = "0.52.0";
  
    disabled = isPy27;
  
  
negative.code:   meta = with lib; {
      description = "Work with email and mailbox by IMAP";
      homepage = "https://github.com/ikvk/imap_tools";
      changelog = "https://github.com/ikvk/imap_tools/blob/v${version}/docs/release_notes.rst";
      license = licenses.asl20;
      maintainers = with maintainers; [ dotlambda ];
    };
  