可以将Seq对象处理成正常的Python字符串,比如迭代元素,取序列长度: >>> from Bio.Seq import Seq >>> from Bio.Alphabet import IUPAC >>> my_seq = Seq("GATCG", IUPAC.unambiguous_dna) >>> for index, letter in enumerate(my_seq): ... print index, letter 0 G 1 A 2 T 3 C 4 G >>> print len(my_seq) 5