如何在文本文件中的某个行号之后添加一个空行？

Question

我得到了一个 100 行的文件。我想删除第 26 行到第 49 行，所以我做了：

import os
l1 = []
with open(r"C:work001.txt", 'r') as fp:
    l1 = fp.readlines()
with open(r"C:work001.txt", 'w') as fp:
    for number, line in enumerate(l1):
        if number not in list (range(25, 49)):
            fp.write(line)

这样做之后，第26行到第49行被删除。但是现在我想在第 25 行之后添加一个空行。我该怎么做？

Answer 1

你可以写"\n"。 \n是一个特殊字符，代表行跳转。

Answer 2

可能的解决方案：

import os
l1 = []
with open(r"C:work001.txt", 'r') as fp:
    l1 = fp.readlines()
with open(r"C:work001.txt", 'w') as fp:
    for line in l1[:25]:
        fp.write(line)
    fp.write("\n")
    for line in l1[49:]:
        fp.write(line)

Answer 3

这项任务很简单，因为您已经有了行号：

import os
l1 = []
with open(r"C:work001.txt", 'r') as fp:
    l1 = fp.readlines()

with open(r"C:work001.txt", 'w') as fp:
    for number, line in enumerate(l1):
        if number not in list (range(25, 49)):
            fp.write(line)
        if number == 24:
            fp.write('\n')

这段代码在第25行之后写了一个空行，因为enumerate函数计数从零开始，所以我们检查if number == 24，并且是在你写完line变量之后.

如何在文本文件中的某个行号之后添加一个空行？

How can I add an empty line after a certain linenumber within a text file?

python

file

add

line