code: def _get_len(self, x, y):
      self.past_seq_len = x.shape[1]
      self.feature_num = x.shape[2]
      # self.future_seq_len = y.shape[1]
      self.target_col_num = y.shape[2]
  
imports: import pickle
  import numpy
  from tensorflow.keras.models import Model
  from tensorflow.keras.layers import Input, LSTM, Dense
  import tensorflow.keras
  from bigdl.orca.automl.model.abstract import BaseModel
  from bigdl.orca.automl.metrics import Evaluator
label_desc: Use image node_id 7 for calling the LSTMSeq2Seq obj's underlying member method code with example usage: obj._get_len(x, y) without return types