Add python 3.12 to tfkeras CI and remove warning message

Author: nzw0301

.github/workflows/tfkeras.yml

@@ -14,7 +14,7 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11']
+        python-version: ['3.7', '3.8', '3.9', '3.10', '3.11', '3.12']
 
     steps:
     - uses: actions/checkout@v4

tfkeras/tfkeras_integration.py

@@ -15,8 +15,8 @@
 import urllib
 
 import optuna
-from optuna.integration import TFKerasPruningCallback
 from optuna.trial import TrialState
+from optuna.integration import TFKerasPruningCallback
 import tensorflow_datasets as tfds
 
 import tensorflow as tf

tfkeras/tfkeras_simple.py

@@ -15,6 +15,7 @@
 from tensorflow.keras.datasets import mnist
 from tensorflow.keras.layers import Conv2D
 from tensorflow.keras.layers import Dense
+from tensorflow.keras.layers import Input
 from tensorflow.keras.layers import Flatten
 from tensorflow.keras.models import Sequential
 from tensorflow.keras.optimizers import RMSprop
@@ -47,13 +48,13 @@ def objective(trial):
     input_shape = (img_x, img_y, 1)
 
     model = Sequential()
+    model.add(Input(input_shape))
     model.add(
         Conv2D(
             filters=trial.suggest_categorical("filters", [32, 64]),
             kernel_size=trial.suggest_categorical("kernel_size", [3, 5]),
             strides=trial.suggest_categorical("strides", [1, 2]),
             activation=trial.suggest_categorical("activation", ["relu", "linear"]),
-            input_shape=input_shape,
         )
     )
     model.add(Flatten())