How to disable GPU with TensorFlow?

disable_gpu.py

try:
    # Disable all GPUS
    tf.config.set_visible_devices([], 'GPU')
    visible_devices = tf.config.get_visible_devices()
    for device in visible_devices:
        assert device.device_type != 'GPU'
except:
    # Invalid device or cannot modify virtual devices once initialized.
    pass
  
 #2nd method
import os
os.environ["CUDA_VISIBLE_DEVICES"] = "-1"