class_docstr: A group of sequences that are generated from the same prompt.
  
  Args:
      request_id: The ID of the request.
      seqs: The list of sequences.
      sampling_params: The sampling parameters used to generate the outputs.
      arrival_time: The arrival time of the request.
class_docstr_tok: ["A","group","of","sequences","that","are","generated","from","the","same","prompt",".","Args",":","request_id",":","The","ID","of","the","request",".","seqs",":","The","list","of","sequences",".","sampling_params",":","The","sampling","parameters","used","to","generate","the","outputs",".","arrival_time",":","The","arrival","time","of","the","request","."]
code: def num_unfinished_seqs(self) -> int:
      return len(self.get_unfinished_seqs())
  
imports: import copy
  import enum
  import time
  from typing import Dict, List, Optional, Union
  from bigdl.llm.vllm.sampling_params import SamplingParams
  from bigdl.llm.utils.common import invalidInputError
label_desc: Use image node_id 7 for calling the SequenceGroup obj's underlying member method code with example usage: obj.num_unfinished_seqs() and returns: len