TensorFlow The data type used is?

in TensorFlow2.0 in tf.contrib The method can continue to be used.

Regarding Bayesian formula: P(W|X)=P(X|W)*P(W)/P(X) What is the correct description?

The following about KNN Algorithm k The value description is correct?

Artificial intelligence is a new technical science that studies and develops theories, methods and application systems for simulating, extending and extending human intelligence. It is one of the core research areas of machine learning.