AttributeError: module 'keras.api._v2.keras.backend' has no attribute 'get_session'

This error occurs when using an outdated version of Keras. The function `get_session()` was removed in Keras 2.4.0 and replaced with `tf.compat.v1.keras.backend.get_session()` in order to switch to TensorFlow 2.0 backend.

To fix this error, try updating Keras to the latest version by running `pip install keras --upgrade` in your terminal. If that doesn't work, try replacing all instances of `keras.backend.get_session()` with `tf.compat.v1.keras.backend.get_session()` in your code.

Alternatively, you can use the following code snippet to check the version of Keras and use the appropriate session function:

import keras
import tensorflow as tf
 
if int(keras.__version__.split('.')[0]) < 2:
    session = keras.backend.get_session()
else:
    session = tf.compat.v1.keras.backend.get_session()