Set device target and device id for running environment.
Note
The device_target must be set in the ["CPU", "GPU", "Ascend"], there is no default value.
Parameters
device_target (str) – The target device to run, only support "Ascend", "GPU", and "CPU".
device_id (int) – ID of the target device, the value must be in [0, device_num_per_host-1], Default: 0 .
"device_num_per_host" refers to the total number of devices on the host.