docs: def select(self, neurons):
          """
          Select spike trains.
  
  
          Parameters
          ----------
          neurons : numpy.ndarray or list
              Array of list of neurons.
  
  
          Returns
          -------
          list
              List of numpy.ndarray objects containing spike times.
  
  
          See also
          --------
          sqlite3.connect.cursor
          
          """
          s = []
          for neuron in neurons:
              self.cursor.execute('SELECT time FROM spikes where neuron = %d' % neuron)
              sel = self.cursor.fetchall()
              spikes = np.array(sel).flatten()
              s.append(spikes)
          return s