code: def test_predict_and_callback(self):
      from kashgari.corpus import ChineseDailyNerCorpus
      from kashgari.callbacks import EvalCallBack
  
      train_x, train_y = ChineseDailyNerCorpus.load_data("train")
      valid_x, valid_y = ChineseDailyNerCorpus.load_data("valid")
  
      model = BiGRU_Model(sequence_length=10)
  
      eval_callback = EvalCallBack(
          kash_model=model,
          x_data=valid_x[:200],
          y_data=valid_y[:200],
          truncating=True,
          step=1,
      )
  
      model.fit(
          train_x[:300],
          train_y[:300],
          valid_x[:200],
          valid_y[:200],
          epochs=1,
          callbacks=[eval_callback],
      )
      response = model.predict(train_x[:200], truncating=True)
      lengths = [len(i) for i in response]
      assert all([(i <= 10) for i in lengths])
  
      response = model.predict(train_x[:200])
      lengths = [len(i) for i in response]
      assert not all([(i <= 10) for i in lengths])
  
file_path: Kashgari/tests/test_labeling/test_bi_gru_model.py
imports: import unittest
  import tests.test_labeling.test_bi_lstm_model
  from kashgari.tasks.labeling import BiGRU_Model
label_desc: Use image node_id 3 for calling the TestBiGRU_Model obj's underlying member method code with example usage: obj.test_predict_and_callback() without return types