code: def _day_of_week(self):
      dayWeek = np.array(self.dti.dayofweek, dtype=np.float32)
      if self.normalized:
          dayWeek = dayWeek / 6.0 - 0.5
      return dayWeek
  
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 4 for calling the TimeCovariates obj's underlying member method code with example usage: obj._day_of_week() and returns: dayWeek