code: def _check_depth(depth, kind="depth_mne"):
      """Check depth options."""
      if not isinstance(depth, dict):
          depth = dict(exp=None if depth is None else float(depth))
      return _handle_default(kind, depth)
  
imports: import numbers
  import operator
  import os
  import re
  from builtins import input
  from difflib import get_close_matches
  from importlib import import_module
  from pathlib import Path
  import numpy
  from ..defaults import HEAD_SIZE_DEFAULT, _handle_default
  from ..fixes import _compare_version, _median_complex
  from ._logging import _record_warnings, _verbose_safe_false, logger, verbose, warn
label_desc: Use image node_id 35 for calling a global function with example usage: _check_depth(depth, kind) and returns: _handle_default