code: def pre(self) -> Optional[Tuple[str, int]]:
      _pre: Optional[Tuple[str, int]] = self._version.pre
      return _pre
  
imports: import collections
  import itertools
  import re
  import warnings
  from typing import Callable, Iterator, List, Optional, SupportsInt, Tuple, Union
  from ._structures import Infinity, InfinityType, NegativeInfinity, NegativeInfinityType
label_desc: Use image node_id 6 for calling the Version obj's underlying member method code with example usage: obj.pre() and returns: _pre