fix keras dependency specification

pyproject.toml

@@ -30,8 +30,8 @@ version = "0.13.0"
 
 [tool.poetry.dependencies]
 python = ">=3.9.0,<4"
-scikit-learn = ">=1.4.1.post1"
-keras = { git = "https://github.com/keras-team/keras.git", rev = "master" }
+scikit-learn = ">=1.4.2"
+keras = ">=3.2.0"
 tensorflow = { version = ">=2.16.1", optional = true }
 
 [tool.poetry.extras]
@@ -51,6 +51,8 @@ pre-commit = ">=2.20.0"
 pytest = ">=7.1.2"
 pytest-cov = ">=3.0.0"
 sphinx = ">=5.0.2"
+tensorflow = ">=2.16.1"
+tensorflow-io-gcs-filesystem = { version = "<=0.31.0", markers = "python_version < '3.12' and sys_platform == 'win32'" }
 
 [tool.ruff]
 select = [

scikeras/_saving_utils.py

@@ -3,9 +3,8 @@
 
 import keras as keras
 import keras.saving
-import keras.saving.object_registration
 import numpy as np
-from keras.saving.saving_lib import load_model, save_model
+from keras.src.saving.saving_lib import load_model, save_model
 
 
 def unpack_keras_model(
@@ -25,7 +24,7 @@ def pack_keras_model(
     """Support for Pythons's Pickle protocol."""
     tp = type(model)
     out = BytesIO()
-    if tp not in keras.saving.object_registration.GLOBAL_CUSTOM_OBJECTS:
+    if tp not in keras.saving.get_custom_objects():
         module = ".".join(tp.__qualname__.split(".")[:-1])
         name = tp.__qualname__.split(".")[-1]
         keras.saving.register_keras_serializable(module, name)(tp)

tests/conftest.py

@@ -3,19 +3,18 @@
 from typing import TYPE_CHECKING, Iterator
 
 import pytest
-from keras.backend import config as backend_config
-from keras.backend import set_floatx
+from keras import backend
 
 if TYPE_CHECKING:
     from _pytest.fixtures import FixtureRequest
 
 
 @pytest.fixture(autouse=True)
 def set_floatx_and_backend_config(request: FixtureRequest) -> Iterator[None]:
-    current = backend_config.floatx()
+    current = backend.floatx()
     floatx = getattr(request, "param", "float32")
-    set_floatx(floatx)
+    backend.set_floatx(floatx)
     try:
         yield
     finally:
-        set_floatx(current)
+        backend.set_floatx(current)

tests/test_compile_kwargs.py

@@ -5,9 +5,9 @@
 from keras import losses as losses_module
 from keras import metrics as metrics_module
 from keras import optimizers as optimizers_module
-from keras.backend.common.variables import KerasVariable
 from keras.layers import Dense, Input
 from keras.models import Model
+from keras.src.backend.common.variables import KerasVariable
 from sklearn.datasets import make_classification
 
 from scikeras.wrappers import KerasClassifier