code: def __str__(self) -> str:
      parts = []
  
      # Epoch
      if self.epoch != 0:
          parts.append(f"{self.epoch}!")
  
      # Release segment
      parts.append(".".join(str(x) for x in self.release))
  
      # Pre-release
      if self.pre is not None:
          parts.append("".join(str(x) for x in self.pre))
  
      # Post-release
      if self.post is not None:
          parts.append(f".post{self.post}")
  
      # Development release
      if self.dev is not None:
          parts.append(f".dev{self.dev}")
  
      # Local version segment
      if self.local is not None:
          parts.append(f"+{self.local}")
  
      return "".join(parts)
  
imports: import collections
  import itertools
  import re
  from typing import Callable, Optional, SupportsInt, Tuple, Union
label_desc: Use image node_id 3 for calling the Version obj's underlying member method code with example usage: obj.__str__() and returns: str