Convert datadir within config to Path

(it's used as Path all the time!)

freqtrade/configuration/configuration.py

@@ -403,7 +403,7 @@ class Configuration:
             config['pairs'] = config.get('exchange', {}).get('pair_whitelist')
         else:
             # Fall back to /dl_path/pairs.json
-            pairs_file = Path(config['datadir']) / "pairs.json"
+            pairs_file = config['datadir'] / "pairs.json"
             if pairs_file.exists():
                 with pairs_file.open('r') as f:
                     config['pairs'] = json_load(f)

freqtrade/configuration/directory_operations.py

@@ -9,7 +9,7 @@ from freqtrade.constants import USER_DATA_FILES
 logger = logging.getLogger(__name__)
 
 
-def create_datadir(config: Dict[str, Any], datadir: Optional[str] = None) -> str:
+def create_datadir(config: Dict[str, Any], datadir: Optional[str] = None) -> Path:
 
     folder = Path(datadir) if datadir else Path(f"{config['user_data_dir']}/data")
     if not datadir:
@@ -20,7 +20,7 @@ def create_datadir(config: Dict[str, Any], datadir: Optional[str] = None) -> str
     if not folder.is_dir():
         folder.mkdir(parents=True)
         logger.info(f'Created data directory: {datadir}')
-    return str(folder)
+    return folder
 
 
 def create_userdata_dir(directory: str, create_dir=False) -> Path: