Refactor: move RECOMMENDED_PACKAGES to module level

Signed-off-by: Mohammad Amanour Rahman <[email protected]>

Author: aman0311x

monai/data/image_writer.py

@@ -37,6 +37,16 @@
     require_pkg,
 )
 
+RECOMMENDED_PACKAGES = {
+    "png": "Pillow",
+    "jpg": "Pillow",
+    "jpeg": "Pillow",
+    "nii": "nibabel or SimpleITK",
+    "niigz": "nibabel or SimpleITK",
+    "nrrd": "pynrrd",
+    "tif": "Pillow or tifffile",
+    "tiff": "Pillow or tifffile",
+}
 DEFAULT_FMT = "%(asctime)s %(levelname)s %(filename)s:%(lineno)d - %(message)s"
 EXT_WILDCARD = "*"
 logger = get_logger(module_name=__name__, fmt=DEFAULT_FMT)
@@ -116,24 +126,13 @@ def resolve_writer(ext_name, error_if_not_found=True) -> Sequence:
         except Exception:  # other writer init errors indicating it exists
             avail_writers.append(_writer)
     if not avail_writers and error_if_not_found:
-        recommended_packages = {
-            "png": "Pillow",
-            "jpg": "Pillow",
-            "jpeg": "Pillow",
-            "nii": "nibabel or SimpleITK",
-            "nii.gz": "nibabel or SimpleITK",
-            "nrrd": "pynrrd",
-            "tif": "Pillow or tifffile",
-            "tiff": "Pillow or tifffile",
-        }
-
         fmt_clean = fmt.lower()
-        package_hint = recommended_packages.get(fmt_clean, "")
+        package_hint = RECOMMENDED_PACKAGES.get(fmt_clean, "")
 
         msg = f"No ImageWriter backend found for {fmt}."
         if package_hint:
             msg += f" Please install '{package_hint}' (e.g., pip install {package_hint})."
-        
+
         raise OptionalImportError(msg)
 
     writer_tuple = ensure_tuple(avail_writers)