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Get the list of visible physical devices.

Returns the list of PhysicalDevices currently marked as visible to the runtime. A visible device will have at least one LogicalDevice associated with it once the runtime is initialized.

The following example verifies all visible GPUs have been disabled:

physical_devices = tf.config.list_physical_devices('GPU')
  # 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'
  # Invalid device or cannot modify virtual devices once initialized.

device_type (optional string) Only include devices matching this device type. For example "CPU" or "GPU".

List of visible PhysicalDevices