docs: def update(self):
          """Update the GPU stats."""
          # Init new stats
          stats = self.get_init_value()
  
          # !!! JUST FOR TEST (because i did not have any NVidia GPU... :()
          # self.stats = [{"key": "gpu_id", "mem": None, "proc": 60, "gpu_id": 0, "name": "GeForce GTX 560 Ti"}]
          # self.stats = [{"key": "gpu_id", "mem": 10, "proc": 60, "gpu_id": 0, "name": "GeForce GTX 560 Ti"}]
          # self.stats = [{"key": "gpu_id", "mem": 48.64645, "proc": 60.73, "gpu_id": 0, "name": "GeForce GTX 560 Ti"},
          #               {"key": "gpu_id", "mem": 70.743, "proc": 80.28, "gpu_id": 1, "name": "GeForce GTX 560 Ti"},
          #               {"key": "gpu_id", "mem": 0, "proc": 0, "gpu_id": 2, "name": "GeForce GTX 560 Ti"}]
          # self.stats = [{"key": "gpu_id", "mem": 48.64645, "proc": 60.73, "gpu_id": 0, "name": "GeForce GTX 560 Ti"},
          #               {"key": "gpu_id", "mem": None, "proc": 80.28, "gpu_id": 1, "name": "GeForce GTX 560 Ti"},
          #               {"key": "gpu_id", "mem": 0, "proc": 0, "gpu_id": 2, "name": "ANOTHER GPU"}]
          # !!! TO BE COMMENTED
  
          if not self.nvml_ready:
              return self.stats
  
          if self.input_method == 'local':
              stats = self.get_device_stats()
          elif self.input_method == 'snmp':
              # not available
              pass
  
          # Update the stats
          self.stats = stats
  
          return self.stats