【菜鸟Python练习2】[ROSALIND-RNA] 将DNA序列转换为RNA序列

bioinfo.dong

【2】 Transcribing DNA into RNA （将DNA序列转化成RNA序列）
* 可以用Python的built-in function <string.replace()>
* 也可以趁机了解一下Python的regular expression（正则表达式）

[Python] 纯文本查看 复制代码

### 2. Transcribing DNA into RNA ###
import re

dnaSeq = ''
with open('/Users/DONG/Downloads/rosalind_rna.txt') as f:
    for line in f:
        line = line.rstrip()
        dnaSeq += line.upper()

rnaSeq1 = re.sub('T','U',dnaSeq)
rnaSeq2 = dnaSeq.replace('T','U')

print (rnaSeq1)
print (rnaSeq2)

liukili

打卡
[python]

[Python] 纯文本查看 复制代码

import re

with open('test.txt') as f:
    for line in f:
        line = line.strip()
        RnaSeq = re.sub(r'T','U',line)

print(RnaSeq)

帅帅

普通方法：
with open('DNA Nucleotides.txt') as f:
    for a in f:
        print(a.replace('T','U'))
正则表达式：
import re
with open('DNA Nucleotides.txt')as f:
    for a in f:
        b=re.sub('T','U',a)
print(b)

卡卡

cat req.txt
AGCTTTTCATTCTGACTGCAACGGGCAATATGTCTCTGTGTGGATTAAAAAAAGAGTGTCTGATAGCAGC
1. sed s/T/U/g req.txt

2.with open ('req.txt') as f:
        for i in f:
                seq=str(i)
print (seq)
print(seq.replace('T','U'))

3.对于Python的正则 re ，完全不懂

ywl506803062

Python的替换函数——strip(),replace()和re.sub()
http://blog.csdn.net/zcmlimi/article/details/47709049

lin_

from Bio.Seq import Seq
from Bio.Alphabet import IUPAC
seq_dna = Seq('GATGGAACTTGACTACGTAAATT', IUPAC.unambiguous_dna)
seq_rna = seq_dna.transcribe()
print(seq_rna)

藏青衣

from Bio.Seq import Seq

def main():
    seq1 = 'GATGGAACTTGACTACGTAAATT'
    rna1 = Seq(seq1).transcribe()
    print(rna1)


if __name__ == '__main__':
    main()