如何在文本文件中的特定行号后添加空行？

发布于 2025-01-20 09:40:26 字数 356 浏览 2 评论 0原文

我得到了一个有100行的文件。我想删除第26行至49行，所以我做到了：

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行直到第49行被删除。但是现在我想在第25行之后添加一条空线。我该怎么做？

原文

I got a file with 100 lines. I want to delete line 26 till 49 so I did:

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)

After doing this, the 26th line till 49th line are deleted. But now I want to add an empty line after the 25th line. How can I do that?

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深海蓝天 2025-01-27 09:40:26

一个可能的解决方案：

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)

A possible solution:

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)

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翻了热茶 2025-01-27 09:40:26

这个任务很简单，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')

此代码在第 25 行之后写入一个空行，因为 enumerate 函数计数从零开始，因此我们检查 if number == 24，它是在您写入 line 变量之后。

This task is simple because you already have the line number:

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')

This code write an empty line after the 25th line, since the enumerate function count starts from zero, so we check if number == 24, and it's after you write the line variable.

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