Improve code quality

freqtrade/commands/hyperopt_commands.py

@@ -86,7 +86,6 @@ def start_hyperopt_show(args: Dict[str, Any]) -> None:
         config['user_data_dir'] / 'hyperopt_results',
         config.get('hyperoptexportfilename'))
 
-
     n = config.get('hyperopt_show_index', -1)
 
     filteroptions = {

freqtrade/data/btanalysis.py

@@ -91,7 +91,8 @@ def get_latest_hyperopt_file(directory: Union[Path, str], predef_filename: str =
         * `directory/.last_result.json` does not exist
         * `directory/.last_result.json` has the wrong content
     """
-
+    if isinstance(directory, str):
+        directory = Path(directory)
     if predef_filename:
         return directory / predef_filename
     return directory / get_latest_hyperopt_filename(directory)