Notebook instances in DevEnviron support the Keras engine. The Keras engine is not supported in job training and model deployment (inference).
Keras is an advanced neural network API written in Python. It is capable of running on top of TensorFlow, CNTK, or Theano. Notebook instances in DevEnviron support tf.keras.
The following figure shows the Keras versions when Python3 and TensorFlow-1.8 are selected during notebook instance creation.