1 #encoding = utf-8
 2 
 3 """
 4 简介：fasta文件中dna to rna
 5 作者：刘自军
 6 date：2017年5月12日 20:59
 7 """
 8 
 9 import sys
10 from collections import OrderedDict
11 
12 args = sys.argv
13 
14 tmp_dit = OrderedDict()
15 
16 with open(args[1]) as f:
17     for line in f:
18 
19         line = line.upper().strip(‘\n‘)
20 
21         if line.startswith(‘>‘):
22             seq_id = line
23             tmp_dit[seq_id] = ‘‘
24         else:
25             tmp_dit[seq_id] = line.replace(‘T‘,‘U‘)
26             #replace的用法为string.replace(old,new)
27 
28 for seq_id,seq in tmp_dit.items():
29     print (‘%s\n%s‘ %(seq_id,seq))

 1 #encoding = utf-8
 2 
 3 """
 4 简介：fasta文件中dna to rna 使用sub
 5 作者：刘自军
 6 date：2017年5月12日 20:59
 7 """
 8 
 9 import sys
10 import re
11 from collections import OrderedDict
12 
13 args = sys.argv
14 
15 tmp_dit = OrderedDict()
16 
17 with open(args[1]) as f:
18     for line in f:
19 
20         line = line.upper().strip(‘\n‘)
21 
22         if line.startswith(‘>‘):
23             seq_id = line
24             tmp_dit[seq_id] = ‘‘
25         else:
26             tmp_dit[seq_id] = re.sub(‘T‘,‘U‘,line)
27             #re.sub(pattern,repl,string)
28             #即re.sub(old,new,string)
29 
30 for seq_id,seq in tmp_dit.items():
31     print (‘%s\n%s‘ %(seq_id,seq))