code: def track_disk():
      res = psutil.disk_usage(lab.get_path())
      tracker.add(
          {
              "disk.free": res.free,
              "disk.total": res.total,
              "disk.used": res.used,
          }
      )
  
file_path: labml/client/test/hardware_track.py
imports: import time
  import psutil
  from labml import lab, experiment, tracker
  from labml.logger import inspect
label_desc: Use image node_id 4 for calling a global function with example usage: track_disk() without return types