def _pick_aux_channels(info, exclude='bads'):
 return pick_types(info, meg=False, eog=True, ecg=True, emg=True, bio=True, ref_meg=False, exclude=exclude)

def _pick_aux_channels ( info , exclude = 'bads' ) : return pick_types ( info , meg = False , eog = True , ecg = True , emg = True , bio = True , ref_meg = False , exclude = exclude )
pick only auxiliary channels .