code: def _matched_loc_idx(mag_loc, all_loc):
      return np.where(
          [
              np.allclose(mag_loc[-3:], loc[-3:])
              and np.allclose(mag_loc[:3], loc[:3])
              for loc in all_loc
          ]
      )[0]
  
imports: from collections import defaultdict
  from functools import partial
  import numpy
  from scipy.optimize import fmin_cobyla
  from .._fiff.pick import pick_info, pick_types
  from .._fiff.tag import _coil_trans_to_loc, _loc_to_coil_trans
  from ..bem import _check_origin
  from ..io import BaseRaw
  from ..transforms import _find_vector_rotation
  from ..utils import _check_fname, _check_option, _ensure_int, _pl, _reg_pinv, _validate_type, check_fname, logger, verbose
  from .maxwell import _col_norm_pinv, _get_grad_point_coilsets, _prep_fine_cal, _prep_mf_coils, _read_cross_talk, _trans_sss_basis
label_desc: Use image node_id 2 for calling a global function with example usage: _matched_loc_idx(mag_loc, all_loc) and returns: np