Adds JAX version checking for Export (#923)

* Add JAX version checking

* Fix formatting

* Add test for invalid version

keras_core/export/export_lib.py

@@ -91,6 +91,16 @@ def __init__(self):
                 "The export API is only compatible with JAX and TF backends."
             )
 
+        # TODO(nkovela): Make JAX version checking programatic.
+        if backend.backend() == "jax":
+            from jax import __version__ as jax_v
+
+            if jax_v > "0.4.15":
+                raise ValueError(
+                    "The export API is only compatible with JAX version 0.4.15 "
+                    f"and prior. Your JAX version: {jax_v}"
+                )
+
     @property
     def variables(self):
         return self._tf_trackable.variables

keras_core/export/export_lib_test.py

@@ -1,5 +1,6 @@
 """Tests for inference-only model/layer exporting utilities."""
 import os
+import sys
 
 import numpy as np
 import pytest
@@ -28,6 +29,10 @@ def get_model():
     backend.backend() not in ("tensorflow", "jax"),
     reason="Export only currently supports the TF and JAX backends.",
 )
+@pytest.mark.skipif(
+    backend.backend() == "jax" and sys.modules["jax"].__version__ > "0.4.15",
+    reason="The export API is only compatible with JAX version <= 0.4.15.",
+)
 class ExportArchiveTest(testing.TestCase):
     def test_standard_model_export(self):
         temp_filepath = os.path.join(self.get_temp_dir(), "exported_model")
@@ -537,6 +542,18 @@ def test_model_export_method(self):
         )
 
 
+@pytest.mark.skipif(
+    backend.backend() != "jax" or sys.modules["jax"].__version__ <= "0.4.15",
+    reason="This test is for invalid JAX versions, i.e. versions > 0.4.15.",
+)
+class VersionTest(testing.TestCase):
+    def test_invalid_jax_version(self):
+        with self.assertRaisesRegex(
+            ValueError, "only compatible with JAX version"
+        ):
+            _ = export_lib.ExportArchive()
+
+
 @pytest.mark.skipif(
     backend.backend() != "tensorflow",
     reason="TFSM Layer reloading is only for the TF backend.",