>chr1 <_io.TextIOWrapper name='result.fa' mode='w' encoding='UTF-8'>

 

001、问题

[root@pc1 test4]# ls
a.fa  test.py
[root@pc1 test4]# cat a.fa
>chr1
aatt
cc
>chr2
ttgg
ccttgg
>chr3
TTCCGG
cctt
ccgg
[root@pc1 test4]# cat test.py
#!/usr/bin/python

in_file = open("a.fa", "r")
out_file = open("result.fa", "w")

for i in in_file:
        i = i.strip()
        if i.startswith(">"):
                print(i, out_file)
[root@pc1 test4]# python test.py
>chr1 <_io.TextIOWrapper name='result.fa' mode='w' encoding='UTF-8'>
>chr2 <_io.TextIOWrapper name='result.fa' mode='w' encoding='UTF-8'>
>chr3 <_io.TextIOWrapper name='result.fa' mode='w' encoding='UTF-8'>

 

 

002、解决方法

[root@pc1 test4]# cat test.py
#!/usr/bin/python

in_file = open("a.fa", "r")
out_file = open("result.fa", "w")

for i in in_file:
        i = i.strip()
        if i.startswith(">"):
                print(i, file = out_file)   ## 在此处添加 file =