docs: def write_peps(self, peps, reverse_seqs):
          """Writes peps to db. We can reverse to be able to look up
          peptides that have some amino acids missing at the N-terminal.
          This way we can still use the index.
          """
          if reverse_seqs:
              peps = [(x[0][::-1],) for x in peps]
          cursor = self.get_cursor()
          cursor.executemany(
              'INSERT INTO known_searchspace(seqs) VALUES (?)', peps)
          self.conn.commit()