tf.keras.layers.InputSpec | TensorFlow Core v2.7.0
www.tensorflow.org › tf › kerasLayers can expose (if appropriate) an input_spec attribute: an instance of InputSpec, or a nested structure of InputSpec instances (one per input tensor). These objects enable the layer to run input compatibility checks for input structure, input rank, input shape, and input dtype. A None entry in a shape is compatible with any dimension, a ...