将主题标签写入文件

发布于 2025-01-10 03:14:37 字数 396 浏览 0 评论 0原文

我正在使用 python 脚本创建一个 shell 脚本，我希望用注释对其进行注释。如果我想将带有主题标签的字符串添加到这样的代码部分：

with open(os.path.join("location","filename"),"w") as f:
    file = f.read()

file += """my_function() {{
if [ $# -eq 0 ]
then
echo "Please supply an argument"
return
fi
echo "argument is $1"
}}
"""
with open(os.path.join("location","filename"),"w") as f:
    f.write(file)

完成此操作的最佳方法是什么？

原文

I am using a python script to create a shell script that I would ideally like to annotate with comments. If I want to add strings with hashtags in them to a code section like this:

with open(os.path.join("location","filename"),"w") as f:
    file = f.read()

file += """my_function() {{
if [ $# -eq 0 ]
then
echo "Please supply an argument"
return
fi
echo "argument is $1"
}}
"""
with open(os.path.join("location","filename"),"w") as f:
    f.write(file)

what is the best way I can accomplish this?

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笑饮青盏花 2025-01-17 03:14:37

您在该字符串文字中已经有一个 # 字符，在 $# 中，所以我不确定问题是什么。

正如您所注意到的，Python 将 """ 字符串文字视为一个大字符串、换行符、注释式序列等等，直到结尾 """。

要通过原始数据传递转义字符（例如 \n 作为 \n，而不是换行符），您可以使用 r"""..."" “。

换句话说，

with open("x", "w") as f:
    f.write("""x
hi # hello world
""")

您最终会得到一个包含以下内容的文件

x
hi # hello world

You already have a # character in that string literal, in $#, so I'm not sure what the problem is.

Python considers a """ string literal as one big string, newlines, comment-esque sequences and all, as you've noticed, until the ending """.

To also pass escape characters (e.g. \n as \n, not a newline) through raw, you'd use r"""...""".

In other words, with

with open("x", "w") as f:
    f.write("""x
hi # hello world
""")

you end up with a file containing

x
hi # hello world

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獨角戲 2025-01-17 03:14:37

就您更广泛的目标而言，从 Python 脚本编写带有 bash 函数文件的文件似乎有点任性。

这并不是一个真正可靠的做法，如果您的用例特别要求您通过脚本定义 bash 函数，请进一步解释您的用例。一种更简洁的方法是：

定义一个 .sh 文件并从其中读取内容：

# function.sh

my_function() {{
 # Some code
}}

然后在脚本中：

with open('function.sh', 'r') as function_fd:
 # Opened in 'append' mode so that content is automatically appended
 with open(os.path.join("location","filename"), "a") as target_file: 
   target_file.write(function_fd.read())

In terms of your wider goal, to write a file with a bash function file from a Python script seems a little wayward.

This is not really a reliable practise, if your use case specifically requires you to define a bash function via script, please explain your use case further. A cleaner way to do this would be:

Define an .sh file and read contents in from there:

# function.sh

my_function() {{
 # Some code
}}

Then in your script:

with open('function.sh', 'r') as function_fd:
 # Opened in 'append' mode so that content is automatically appended
 with open(os.path.join("location","filename"), "a") as target_file: 
   target_file.write(function_fd.read())

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