Raise FileNotFound exception in get_file if the file doesn't exist.

keras_nlp/utils/preset_utils.py

@@ -26,11 +26,13 @@
 
 try:
     import kagglehub
+    from kagglehub.exceptions import KaggleApiHTTPError
 except ImportError:
     kagglehub = None
 
 try:
     import huggingface_hub
+    from huggingface_hub.utils import EntryNotFoundError
     from huggingface_hub.utils import HFValidationError
 except ImportError:
     huggingface_hub = None
@@ -85,7 +87,7 @@ def list_subclasses(cls):
 
 def get_file(preset, path):
     """Download a preset file in necessary and return the local path."""
-    # TODO: Through FileNotFoundError when the path doesn't exist.
+    # TODO: Add tests for FileNotFound exceptions.
     if not isinstance(preset, str):
         raise ValueError(
             f"A preset identifier must be a string. Received: preset={preset}"
@@ -108,7 +110,17 @@ def get_file(preset, path):
                 "'kaggle://username/bert/keras/bert_base_en/1' (to specify a "
                 f"version). Received: preset={preset}"
             )
-        return kagglehub.model_download(kaggle_handle, path)
+        try:
+            return kagglehub.model_download(kaggle_handle, path)
+        except KaggleApiHTTPError as e:
+            message = str(e)
+            if message.find("403 Client Error"):
+                raise FileNotFoundError(
+                    f"`{path}` doesn't exist in preset directory `{preset}`.\n"
+                )
+            else:
+                raise ValueError(message)
+
     elif preset.startswith(GS_PREFIX):
         url = os.path.join(preset, path)
         url = url.replace(GS_PREFIX, "https://storage.googleapis.com/")
@@ -138,9 +150,22 @@ def get_file(preset, path):
                 "should have the form 'hf://{org}/{model}'. For example, "
                 f"'hf://username/bert_base_en'. Received: preset={preset}."
             ) from e
+        except EntryNotFoundError as e:
+            message = str(e)
+            if message.find("403 Client Error"):
+                raise FileNotFoundError(
+                    f"`{path}` doesn't exist in preset directory `{preset}`.\n"
+                )
+            else:
+                raise ValueError(message)
     elif os.path.exists(preset):
         # Assume a local filepath.
-        return os.path.join(preset, path)
+        local_path = os.path.join(preset, path)
+        if not os.path.exists(local_path):
+            raise FileNotFoundError(
+                f"`{path}` doesn't exist in preset directory `{preset}`.\n"
+            )
+        return local_path
     else:
         raise ValueError(
             "Unknown preset identifier. A preset must be a one of:\n"