code: def _hour_of_day(self):
      hours = np.array(self.dti.hour, dtype=np.float32)
      if self.normalized:
          hours = hours / 23.0 - 0.5
      return hours
  
file_path: BigDL/python/chronos/src/bigdl/chronos/model/tcmf/time.py
imports: import pandas
  import numpy
  from packaging import version
label_desc: Use image node_id 3 for calling the TimeCovariates obj's underlying member method code with example usage: obj._hour_of_day() and returns: hours