code: def read_head_pos(fname):
      """Read MaxFilter-formatted head position parameters.
  
      Parameters
      ----------
      fname : path-like
          The filename to read. This can be produced by e.g.,
          ``maxfilter -headpos <name>.pos``.
  
      Returns
      -------
      pos : array, shape (N, 10)
          The position and quaternion parameters from cHPI fitting.
  
      See Also
      --------
      write_head_pos
      head_pos_to_trans_rot_t
  
      Notes
      -----
      .. versionadded:: 0.12
      """
      _check_fname(fname, must_exist=True, overwrite="read")
      data = np.loadtxt(
          fname, skiprows=1
      )  # first line is header, skip it
      data.shape = (-1, 10)  # ensure it's the right size even if empty
      if np.isnan(data).any():  # make sure we didn't do something dumb
          raise RuntimeError(
              "positions could not be read properly from %s" % fname
          )
      return data
  
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 1 for calling a global function with example usage: read_head_pos(fname) and returns: data