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Return a list of physical devices visible to the runtime.
Used in the guide:
Used in the tutorials:
Physical devices are hardware devices locally present on the current machine.
By default all discovered CPU and GPU devices are considered visible. The
list_physical_devices allows querying the hardware prior to runtime
The following example ensures the machine can see at least 1 GPU.
physical_devices = tf.config.experimental.list_physical_devices('GPU') assert len(physical_devices) > 0, "No GPUs found."
device_type: (optional) Device type to filter by such as "CPU" or "GPU"
List of PhysicalDevice objects