docstr: load traits from a Config object
code: def _load_config(
      self,
      cfg: Config,
      section_names: list[str] | None = None,
      traits: dict[str, TraitType[t.Any, t.Any]] | None = None,
  ) -> None:
      """load traits from a Config object"""
  
      if traits is None:
          traits = self.traits(config=True)
      if section_names is None:
          section_names = self.section_names()
  
      my_config = self._find_my_config(cfg)
  
      # hold trait notifications until after all config has been loaded
      with self.hold_trait_notifications():
          for name, config_value in my_config.items():
              if name in traits:
                  if isinstance(config_value, LazyConfigValue):
                      # ConfigValue is a wrapper for using append / update on containers
                      # without having to copy the initial value
                      initial = getattr(self, name)
                      config_value = config_value.get_value(initial)
                  elif isinstance(config_value, DeferredConfig):
                      # DeferredConfig tends to come from CLI/environment variables
                      config_value = config_value.get_value(
                          traits[name]
                      )
                  # We have to do a deepcopy here if we don't deepcopy the entire
                  # config object. If we don't, a mutable config_value will be
                  # shared by all instances, effectively making it a class attribute.
                  setattr(self, name, deepcopy(config_value))
              elif not _is_section_key(name) and not isinstance(
                  config_value, Config
              ):
                  from difflib import get_close_matches
  
                  if isinstance(self, LoggingConfigurable):
                      assert self.log is not None
                      warn = self.log.warning
                  else:
  
                      def warn(msg: t.Any) -> None:
                          return warnings.warn(
                              msg, UserWarning, stacklevel=9
                          )
  
                  matches = get_close_matches(name, traits)
                  msg = f"Config option `{name}` not recognized by `{self.__class__.__name__}`."
  
                  if len(matches) == 1:
                      msg += f"  Did you mean `{matches[0]}`?"
                  elif len(matches) >= 1:
                      msg += (
                          "  Did you mean one of: `{matches}`?".format(
                              matches=", ".join(sorted(matches))
                          )
                      )
                  warn(msg)
  
imports: from __future__ import annotations
  import logging
  import typing
  from copy import deepcopy
  from textwrap import dedent
  from traitlets.traitlets import Any, Container, Dict, HasTraits, Instance, TraitType, default, observe, observe_compat, validate
  from traitlets.utils import warnings
  from traitlets.utils.bunch import Bunch
  from traitlets.utils.text import indent, wrap_paragraphs
  from .loader import Config, DeferredConfig, LazyConfigValue, _is_section_key
label_desc: Use image node_id 4 for calling the Configurable obj's underlying member method code with example usage: obj._load_config(cfg, section_names, traits) and returns: warnings