code: def fit(self, X, y=None):
          
          return self.partial_fit(np.concatenate(X, axis=0))
docs: Fit Preprocessing to X.
  
          Parameters
          ----------
          sequence : array-like, [sequence_length, n_features]
              A multivariate timeseries.
          y : None
              Ignored
  
          Returns
          -------
          self