python - 如何在Python中每次跳过文件中的一行？

Question

文件格式:

>ackg_2341
ACGATACGACGACATCA
>ackg_7865
GCACTACGCAGAAACGAA
>...

我想每次都跳过带有“>”的行。我提议这样做，但它不起作用。

f = open("data.txt","r")
    lcs = ''
    if f.read(1)=='>':
        str1 = f.readline[1:]
    for line in f:
        if line.read(1)=='>'
        temp = ''.join(f.readline[1:])
        res = len(lcs_matrix(str1,temp))

        if len(lcs)<res:
            lcs = lcs_matrix(str1, temp)

print(lcs)

我做错了什么？

Traceback (most recent call last):
  File "shared_substr.py", line 83, in <module>
   print(DNA_multi_lcs())
  File "shared_substr.py", line 68, in DNA_multi_lcs
    str1 = f.readline[1:]
TypeError: 'builtin_function_or_method' object is not subscriptable

Answer 1

只需这样做

f = open("data.txt", "r")
n=1#lines you want to skip
for line in f.readlines()[n:]:
    if  line.startswith('>'):
        "what ever you want"
    else:
        print(line)