code: def with_defaults(self) -> PythonOptions:
      # Convert from user provided options to actual build options with default values
      defaults: dict[str, t.Any] = {}
  
      if self.requirements_txt is None:
          if self.lock_packages is None:
              defaults["lock_packages"] = True
  
      return attr.evolve(self, **defaults)
  
imports: from __future__ import annotations
  import logging
  import os
  import re
  import subprocess
  import sys
  import typing
  from shlex import quote
  from sys import version_info
  import attr
  import fs
  import fs.copy
  import psutil
  import yaml
  from pathspec import PathSpec
  from ...exceptions import BentoMLException
  from ...exceptions import InvalidArgument
  from ..configuration import BENTOML_VERSION
  from ..configuration import clean_bentoml_version
  from ..configuration import get_quiet_mode
  from ..container import generate_containerfile
  from ..container.frontend.dockerfile import ALLOWED_CUDA_VERSION_ARGS
  from ..container.frontend.dockerfile import CONTAINER_SUPPORTED_DISTROS
  from ..container.frontend.dockerfile import SUPPORTED_CUDA_VERSIONS
  from ..container.frontend.dockerfile import DistroSpec
  from ..container.frontend.dockerfile import get_supported_spec
  from ..container.generate import BENTO_PATH
  from ..utils import bentoml_cattr
  from ..utils import copy_file_to_fs_folder
  from ..utils import resolve_user_filepath
  from ..utils.dotenv import parse_dotenv
  from .build_dev_bentoml_whl import build_bentoml_editable_wheel
label_desc: Use image node_id 4 for calling the PythonOptions obj's underlying member method code with example usage: obj.with_defaults() and returns: attr