Problem
In DNA strings, symbols ‘A‘ and ‘T‘ are complements of each other, as are ‘C‘ and ‘G‘.
The reverse complement of a DNA string ss is the string scsc formed by reversing the symbols of ss, then taking the complement of each symbol (e.g., the reverse complement of "GTCA" is "TGAC").
Given: A DNA string ss of length at most 1000 bp.
Return: The reverse complement scsc of ss.
Sample Dataset
AAAACCCGGT
Sample Output
ACCGGGTTTT 方法一
def reverse(seq): dict = {‘A‘: ‘T‘, ‘C‘: ‘G‘, ‘T‘: ‘A‘, ‘G‘: ‘C‘} revSeqList = list(reversed(seq)) #[‘T‘, ‘G‘, ‘G‘, ‘C‘, ‘C‘, ‘C‘, ‘A‘, ‘A‘, ‘A‘, ‘A‘] revComSeqList = [dict[k] for k in revSeqList] # [‘A‘, ‘C‘, ‘C‘, ‘G‘, ‘G‘, ‘G‘, ‘T‘, ‘T‘, ‘T‘, ‘T‘] revComSeq = ‘‘.join(revComSeqList) # ACCGGGTTTT return revComSeq seq = ‘AAAACCCGGT‘ print (reverse(seq))
时间: 2024-10-30 05:24:37