利用python将一段DNA转录成RNA

结题思路就是将DNA序列中的T换成U就可以啦，直接import re，然后用sub就行啦

import re

rna_nucleotide = ''
with open(r'D:\Rosalind\haha.txt','w+') as f1:
    with open(r'D:\Rosalind\rosalind_rna.txt','r') as f:
        for nucleotide in f:
            rna_nucleotide += re.sub('T','U',nucleotide)
            
    print (rna_nucleotide,file = f1)

或者在交互式界面中，import re，然后re.sub('T','U',seq)，更方便些，但前提是序列要短，序列长的话内存吃不消啊