code: def __init__(self, vstring: Optional[str]) -> None:
      if vstring:
          self.parse(vstring)
  
file_path: spark/python/pyspark/loose_version.py
imports: import re
  from typing import Optional
label_desc: Use image node_id 1 to create a new LooseVersion object  with example: obj = LooseVersion(vstring)