Simple fix of issue 248, environment variables are now always expanded when...

Simple fix of issue 248, environment variables are now always expanded when used as a dir_path argument

nndet/io/load.py

@@ -180,6 +180,9 @@ def unpack_dataset(folder: Pathlike,
     """
     logger.info("Unpacking dataset")
     npz_files = subfiles(Path(folder), identifier="*.npz", join=True)
+    if not npz_files:
+        logger.warning(f'No paths found in {Path(folder)} matching *.npz')
+        return
     with Pool(processes) as p:
         p.starmap(npz2npy, zip(npz_files, repeat(delete_npz)))
 

nndet/io/paths.py

@@ -34,7 +34,7 @@ def subfiles(dir_path: Path, identifier: str, join: bool) -> List[str]:
     Returns:
         List[str]: found paths/file names
     """
-    paths = list(map(str, list(Path(dir_path).glob(identifier))))
+    paths = list(map(str, list(Path(os.path.expandvars(dir_path)).glob(identifier))))
     if not join:
         paths = [p.rsplit(os.path.sep, 1)[-1] for p in paths]
     return paths