code: def return_hdr(self):
          
  
          subj_id = self._header['name'] + ' ' + self._header['surname']
          chan_name = [ch['chan_name'] for ch in self._header['chans']]
  
          return subj_id, self._header['start_time'], self._header['s_freq'], chan_name, self._n_smp, self._header
docs: Return the header for further use.
  
          Returns
          -------
          subj_id : str
              subject identification code
          start_time : datetime
              start time of the dataset
          s_freq : float
              sampling frequency
          chan_name : list of str
              list of all the channels
          n_samples : int
              number of samples in the dataset
          orig : dict
              additional information taken directly from the header