docstr: Parses `version` option value.
  
  :param value:
  :rtype: str
docstr_tok: ["Parses","`","version","`","option","value",".",":","param","value",":",":","rtype",":","str"]
code: def _parse_version(self, value):
      """Parses `version` option value.
  
      :param value:
      :rtype: str
  
      """
      version = self._parse_file(value, self.root_dir)
  
      if version != value:
          version = version.strip()
          # Be strict about versions loaded from file because it's easy to
          # accidentally include newlines and other unintended content
          try:
              Version(version)
          except InvalidVersion:
              raise OptionError(
                  f"Version loaded from {value} does not "
                  f"comply with PEP 440: {version}"
              )
  
          return version
  
      return expand.version(
          self._parse_attr(value, self.package_dir, self.root_dir)
      )
  
imports: import contextlib
  import functools
  import os
  from collections import defaultdict
  from functools import partial
  from functools import wraps
  from typing import TYPE_CHECKING, Callable, Any, Dict, Generic, Iterable, List, Optional, Set, Tuple, TypeVar, Union
  from ..errors import FileError, OptionError
  from ..extern.packaging.markers import default_environment
  from ..extern.packaging.requirements import InvalidRequirement, Requirement
  from ..extern.packaging.specifiers import SpecifierSet
  from ..extern.packaging.version import InvalidVersion, Version
  from ..warnings import SetuptoolsDeprecationWarning
  from .None import expand
label_desc: Use image node_id 3 for calling the ConfigMetadataHandler obj's underlying member method code with example usage: obj._parse_version(value) and returns: expand, version