AttributeError: module 'tensorflow_core._api.v2.config' has no attribute 'experimental_list_devices'

This error occurs when you try to use the method `experimental_list_devices()` in TensorFlow 2 but it is not available in the module `tensorflow_core._api.v2.config`. This method was experimental and has been removed in TensorFlow 2.

To solve this error, you can use the method `list_physical_devices()` instead. Here's an example:

import tensorflow as tf

physical_devices = tf.config.list_physical_devices('GPU') 
print("Number of GPUs available: ", len(physical_devices)) 

for device in physical_devices:
    print(device)

This will print the number of available GPUs and their names. You can also use the method `list_logical_devices()` to get a list of all logical devices available.