docstr: Parses `packages` option value.
  
  :param value:
  :rtype: list
docstr_tok: ["Parses","`","packages","`","option","value",".",":","param","value",":",":","rtype",":","list"]
code: def _parse_packages(self, value):
      """Parses `packages` option value.
  
      :param value:
      :rtype: list
      """
      find_directives = ["find:", "find_namespace:"]
      trimmed_value = value.strip()
  
      if trimmed_value not in find_directives:
          return self._parse_list(value)
  
      # Read function arguments from a dedicated section.
      find_kwargs = self.parse_section_packages__find(
          self.sections.get("packages.find", {})
      )
  
      find_kwargs.update(
          namespaces=(trimmed_value == find_directives[1]),
          root_dir=self.root_dir,
          fill_package_dir=self.package_dir,
      )
  
      return expand.find_packages(**find_kwargs)
  
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 7 for calling the ConfigOptionsHandler obj's underlying member method code with example usage: obj._parse_packages(value) and returns: expand, self