Question

我正在编写一个脚本，我必须在两行之间插入一行。例如：

   <%= link_to 'Delete', user_task_path(current_user, task.id),
        data: { confirm: 'Are you sure?' }, :method => :delete, remote: true %>

我正在尝试下面提到的代码，但我无法在文件中写任何内容。

<tag1>
    <subtag1>     
           Line 1 - with some text 
           Line 2 - with some text
    </subtag> - #closing of subtag

**--> here i have (between closure of subtag and tag1) to insert a new tag (3 lines, opening tag, body and closing tag)**

</tag1>

有人可以让我知道在上面的代码中我做错了什么，或者编写代码在python中的文件中的两行之间插入一行代码？

Answer 1

根据 jonrsharpe 的评论，最容易理解的方法是阅读整个文件，然后在需要的地方插入行：

# Let's read our input file into a variable
with open('input.html', 'r') as f:
    in_file = f.readlines()  # in_file is now a list of lines

# Now we start building our output
out_file = []
for line in in_file:
    out_file.append(line)  # copy each line, one by one
    if '</subtag>' in line:  # add a new entry, after a match
        out_file.append('    <some new tag>text1</some new tag>\n')

# Now let's write all those lines to a new output file.
# You would re-write over the input file now, if you wanted!
with open('out.html', 'w') as f:
    f.writelines(out_file)

我从这个文件开始：

<tag1>
    <subtag1>
        Line 1 - with some text
        Line 2 - with some text
    </subtag>
</tag1>

结束我的脚本产生了这个：

<tag1>
    <subtag1>
        Line 1 - with some text
        Line 2 - with some text
    </subtag>
    <some new tag>text1</some new tag>
</tag1>

我希望有所帮助！

在行之间写一条线

1 个答案: