怎样将python写入文件_如何在使用python写入文件之前将文件指针排...

Scenario

有一个文件的末尾包含两个空行.当我在文件中附加内容时,它会在两行空白之后写入(可以肯定).

但是我只需要一个空白行并删除第二个空白行.代替第二个空白行,应写入附加数据.

#-------Original file

This is line 1

This is line 2

[--blank line--]

This is line 3

This is line 4

[--blank line--]

[--blank line--]

在上面的文件中追加“这是第5行”和“这是第6行”.

What is happening right now!

#-------Original file

This is line 1

This is line 2

[--blank line--]

This is line 3

This is line 4

[--blank line--]

[--blank line--]

This is line 5

This is line 6

What I want !

#-------Original file

This is line 1

This is line 2

[--blank line--]

This is line 3

This is line 4

[--blank line--] #Only one blank line. Second blank line should be removed

This is line 5

This is line 6

我研究了移动文件指针的解决方案.在将内容追加到文件中时,文件指针可能出现在第二个空行之后.

如果将文件指针向上移动一行然后附加“这是第5行”和“这是第6行”,是否可以工作？

如果是,请协助我该怎么做.

Seek()函数似乎不太有用！

除了seek()之外,其他任何想法都应得到赞赏.

非常感谢您的帮助.