class_docstr: Arguments for vLLM engine.
class_docstr_tok: ["Arguments","for","vLLM","engine","."]
code: def __post_init__(self):
      if self.tokenizer is None:
          self.tokenizer = self.model
  
file_path: BigDL/python/llm/src/bigdl/llm/vllm/engine/arg_utils.py
imports: import argparse
  import dataclasses
  from dataclasses import dataclass
  from typing import Optional, Tuple
  from bigdl.llm.vllm.config import ModelConfig, SchedulerConfig
label_desc: Use image node_id 1 for calling the EngineArgs obj's underlying member method code with example usage: obj.__post_init__() without return types