code: def next(self):
      # next() is required for compatibility with Python2.7.
      return self.__next__()
  
file_path: statsmodels/statsmodels/tsa/statespace/_pykalman_smoother.py
imports: import numpy
label_desc: Use image node_id 5 for calling the _KalmanSmoother obj's underlying member method code with example usage: obj.next() and returns: self