fix: Fix NRRD loading failure caused by LC_NUMERIC locale in ITK

Author: Karol-G

medvol/__init__.py

@@ -1,3 +1,3 @@
-__version__ = "0.0.16"
+__version__ = "0.0.17"
 
 from medvol.medvol import MedVol

medvol/medvol.py

@@ -2,6 +2,8 @@
 from typing import Dict, Optional, Union, List, Tuple
 import numpy as np
 from pathlib import Path
+import locale
+from contextlib import contextmanager
 
 # TODO:
 # - Enable user to set affine
@@ -10,6 +12,20 @@
 # - Rename into MedImg
 
 
+@contextmanager
+def temporary_c_locale():
+    # Save current LC_NUMERIC
+    old_locale = locale.setlocale(locale.LC_NUMERIC, None)
+    
+    try:
+        # Switch to safe C locale
+        locale.setlocale(locale.LC_NUMERIC, "C")
+        yield
+    finally:
+        # Restore original locale
+        locale.setlocale(locale.LC_NUMERIC, old_locale)
+
+
 class MedVol:
     def __init__(self,
                  array: Union[np.ndarray, str, Path],
@@ -211,7 +227,8 @@ def _load(self, filepath):
         Raises:
             RuntimeError: If the dimensionality of the image and metadata do not match.
         """
-        image_sitk = sitk.ReadImage(str(filepath))
+        with temporary_c_locale():
+            image_sitk = sitk.ReadImage(str(filepath))
         array = sitk.GetArrayFromImage(image_sitk)
         ndims = len(array.shape)
         metadata_ndims = len(image_sitk.GetSpacing())