code: def standard_deviation(self) -> np.array:
      return np.sqrt(self.variance())
  
file_path: scattertext/scattertext/contextual_embeddings/running_stats_array.py
imports: import numpy
label_desc: Use image node_id 6 for calling the RunningStatsArray obj's underlying member method code with example usage: obj.standard_deviation() and returns: np