update `__init__.py` in `keras.utils`
@@ -58,6 +58,7 @@ from keras.utils.layer_utils import get_source_inputs
# Deprecated
from keras.utils.np_utils import normalize
from keras.utils.np_utils import to_categorical
+from keras.utils.np_utils import to_ordinal
from keras.utils.data_utils import pad_sequences
# Evaluation related
