code: def _read_double(fid, n=1):
      """Read a double."""
      return np.fromfile(fid, ">f8", n)
  
file_path: mne-python/mne/io/ctf/res4.py
imports: import os.path
  import numpy
  from ...utils import logger
  from .constants import CTF
label_desc: Use image node_id 2 for calling a global function with example usage: _read_double(fid, n) and returns: np