python - 只读特定行

Question

我只想读取某些行，例如 0 到 10 范围内的行，程序应该检查用户输入的数据的正确性。

from ftplib import FTP
from ftplib import error_perm

start = 0 # some starting index
end = 5

with open('string.txt', 'rb') as password_list:
     for i,line in enumerate(password_list):
       if(i>start & i<end):
        line=line.replace(b'\n',b'').replace(b'\r',b'')
        password=line.decode("utf-8")

Answer 1

试试这个:

start = 0
end = 5
with open('string.txt', 'rb') as fh:
   lines = [i.replace(b'\n',b'').replace(b'\r',b'') for i in fh.readlines()][start:end]
   passwords = [i.decode('utf-8') for i in lines]