code: def device_and_data_format():
      if tf.config.list_physical_devices("GPU"):
          return ("/gpu:0", "channels_first")
      return ("/cpu:0", "channels_last")
  
imports: import time
  import tensorflow
label_desc: Use image node_id 1 for calling a global function with example usage: device_and_data_format() and returns: str,  str, str,  str