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
# -*- coding: utf-8 -*-
"""
Created on Thu Dec 08 20:33:16 2016 @author: hyl
“””
alt_map = {'ins':'0'}
complement = {'A': 'T', 'C': 'G', 'G': 'C', 'T': 'A'} def reverse_complement(seq):
for k,v in alt_map.iteritems():
seq = seq.replace(k,v)
bases = list(seq)
bases = reversed([complement.get(base,base) for base in bases])
bases = ''.join(bases)
for k,v in alt_map.iteritems():
bases = bases.replace(v,k)
print bases
if __name__ == "__main__":
fh= open ("C:\\Users\\hyl\\Desktop\\rosalind_revc.txt")
seq =''
for line in fh.readlines():
seq += line
reverse_complement(seq)