title: what 's the meaning of "Using bos_token, but it is not set yet."
body: <p>When I run the demo.py</p>
  <pre><code>from transformers import AutoTokenizer, AutoModel
      
  tokenizer = AutoTokenizer.from_pretrained(&quot;distilbert-base-multilingual-cased&quot;)
  model = AutoModel.from_pretrained(&quot;distilbert-base-multilingual-cased&quot;, return_dict=True)
  # print(model)
  def count_parameters(model):
      return sum(p.numel() for p in model.parameters() if p.requires_grad)
  print(count_parameters(model))
  inputs = tokenizer(&quot;史密斯先生不在，他去看电影了。Mr Smith is not in. He ________ ________to the cinema&quot;, return_tensors=&quot;pt&quot;)
  print(inputs)
  outputs = model(**inputs)
  print(outputs)
  </code></pre>
  <p>the code show</p>
  <pre><code>{'input_ids': tensor([[  101,  2759,  3417,  4332,  2431,  5600,  2080,  3031, 10064,  2196,
        2724,  5765,  5614,  3756,  2146,  1882, 12916, 11673, 10124, 10472,
       10106,   119, 10357,   168,   168,   168,   168,   168,   168,   168,
         168,   168,   168,   168,   168,   168,   168,   168,   168, 10114,
       10105, 18458,   119,   102]]), 'attention_mask': tensor([[1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
       1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1]])}
  </code></pre>
  <p><strong>Using bos_token, but it is not set yet.
  Using eos_token, but it is not set yet.</strong>
  why bos_token is printed?</p>