001\
[root@pc1 test3]# cat a.fa
>chr1
cccccggggggggttttgg
cccgggggg
>chr2
uuuuutttttNNNNNddffff
dddgggggggggggcccccccccc
[root@pc1 test3]# cat test.py
#!/usr/bin/python
in_file = open("a.fa", "r")
out_file = open("result.fa", "w")
tag = in_file.readlines()[0].strip()
print(tag, file = out_file)
step = 8
tail = ""
in_file = open("a.fa", "r")
for i in in_file:
if not i.startswith(">"):
i = i.strip()
i = tail + i
while len(i) >= step:
print(i[:step], file = out_file)
i = i[step::]
tail = i
if len(tail) != 0:
print(tail, file = out_file)
in_file.close()
out_file.close()
2\
[root@pc1 test3]# ls a.fa test.py [root@pc1 test3]# python3 test.py [root@pc1 test3]# ls a.fa result.fa test.py [root@pc1 test3]# cat result.fa >chr1 cccccggg gggggttt tggcccgg gggguuuu utttttNN NNNddfff fdddgggg gggggggc cccccccc c
标签：test3,python,root,scaffold,pc1,fa,file,单条,out From： https://www.cnblogs.com/liujiaxin2018/p/16856777.html