code: def predict_proba(self, a, b, idx=0, **kwargs):
          
          return self.predict_dataset(DataFrame([[a, b]],
                                                columns=['A', 'B']))
docs: Use Jarfo to predict the causal direction of a pair of vars.
  
          Args:
              a (numpy.ndarray): Variable 1
              b (numpy.ndarray): Variable 2
              idx (int): (optional) index number for printing purposes
  
          Returns:
              float: Causation score (Value : 1 if a->b and -1 if b->a)