连接两个文件中的行

Question

考虑以下两个文件:

FILE1.TXT:

    file1line1
    file1line2
    file1line3

FILE2.TXT

    file2line1
    file2line2
    file2line2

我想将file1中的每一行与file2中的相应行组合在一起.

怎么能在python中完成.

您可以假设两个文件中的行数相等.

Answer 1

有了zip()你可以很容易地做到这一点:

with open('file1.txt') as fh1, open('file2.txt') as fh2:
    for line1, line2 in zip(fh1, fh2):
        # line1 from file1, line2 from file2

如果您使用的是Python 2,则会将所有文件加载到内存中; 请itertools.izip()改用以根据需要读取行:

from itertools import izip

with open('file1.txt') as fh1, open('file2.txt') as fh2:
    for line1, line2 in izip(fh1, fh2):
        # line1 from file1, line2 from file2

在Python 3中,zip()表现为itertools.izip().