擅长:python、mysql、java
<p>使用<a href="https://docs.python.org/3/library/pathlib.html" rel="nofollow noreferrer">^{<cd1>}</a>可以通过以下方式实现您想要的:</p>
<pre><code>from pathlib import Path
path = Path(filename)
contents = path.read_text()
contents = contents.replace("\n", "_")
path.write_text(contents)
</code></pre>