Use pathlib instead of text

tibi_hardlinks/filename_creation.py

@@ -1,4 +1,5 @@
 import datetime
+from pathlib import Path
 import os
 
 
@@ -23,11 +24,13 @@ def create_backup_directory_name(backup_info, time_format="%Y-%m-%d_%H-%M-%S"):
         backup_info["backup_time"] = new_time
     except (ValueError, AssertionError):
         raise ConfigurationException("customization", "time_format", time_format)
-    ret_list = []
+    backup_directory_name = Path("")
     for part in HEIRACHY:
         data = backup_info[part]
         if len(data) == 0:
             data = "DEFAULT"
-        ret_list.append(data)
+        backup_directory_name /= data
+
+    return backup_directory_name
+
 
-    return os.path.join("", *ret_list)