code: def trim(self, start, end):
          '''Removes first 'start'/'end' bases off the start/end of the sequence'''
          self.seq = self.seq[start:len(self.seq) - endf trim(self, start, end):
          '''Removes first 'start'/'end' bases off the start/end of the sequence'''
          self.seq = self.seq[start:len(self.seq) - end]
docs: Removes first 'start'/'end' bases off the start/end of the sequence