擅长:python、mysql、java
<p>由于<a href="https://stackoverflow.com/questions/6648493/open-file-for-both-reading-and-writing">open file for both reading and writing?</a>,代码最少</p>
<pre><code># Read and write (r+)
with open("file.txt","r+") as f:
find = r'Linux_CMDLINE="'
changeto = r'Linux_CMDLINE=""'
# splitlines to list and glue them back with join
newstring = ''.join([i if not i.startswith(find) else changeto for i in f])
f.seek(0)
f.write(newstring)
f.truncate()
</code></pre>