code: def _chpi_locs_to_times_dig(chpi_locs):
      """Reformat chpi_locs as list of dig (dict)."""
      dig = list()
      for rrs, gofs in zip(
          *(chpi_locs[key] for key in ("rrs", "gofs"))
      ):
          dig.append(
              [
                  {
                      "r": rr,
                      "ident": idx,
                      "gof": gof,
                      "kind": FIFF.FIFFV_POINT_HPI,
                      "coord_frame": FIFF.FIFFV_COORD_DEVICE,
                  }
                  for idx, (rr, gof) in enumerate(zip(rrs, gofs), 1)
              ]
          )
      return chpi_locs["times"], dig
  
imports: import copy
  import itertools
  from functools import partial
  import numpy
  from scipy.linalg import orth
  from scipy.optimize import fmin_cobyla
  from scipy.spatial.distance import cdist
  from ._fiff.constants import FIFF
  from ._fiff.meas_info import Info, _simplify_info
  from ._fiff.pick import _picks_to_idx, pick_channels, pick_channels_regexp, pick_info, pick_types
  from ._fiff.proj import Projection, setup_proj
  from .channels.channels import _get_meg_system
  from .cov import compute_whitener, make_ad_hoc_cov
  from .dipole import _make_guesses
  from .event import find_events
  from .fixes import jit
  from .forward import _concatenate_coils, _create_meg_coils, _magnetic_dipole_field_vec
  from .io import BaseRaw
  from .io.ctf.trans import _make_ctf_coord_trans_set
  from .io.kit.constants import KIT
  from .io.kit.kit import RawKIT
  from .preprocessing.maxwell import _get_mf_picks_fix_mags, _prep_mf_coils, _regularize_out, _sss_basis
  from .transforms import _angle_between_quats, _fit_matched_points, _quat_to_affine, als_ras_trans, apply_trans, invert_transform, quat_to_rot, rot_to_quat
  from .utils import ProgressBar, _check_fname, _check_option, _on_missing, _pl, _validate_type, _verbose_safe_false, logger, use_log_level, verbose, warn
label_desc: Use image node_id 31 for calling a global function with example usage: _chpi_locs_to_times_dig(chpi_locs) and returns: chpi_locs,  dig