擅长:python、mysql、java
<p>另一个列表理解:</p>
<pre><code>clean_lines = []
with open("transfer-out/" + file, "r") as f:
lines = f.readlines()
clean_lines = [l.strip() for l in lines if l.strip()]
with open("transfer-out/"+file, "w") as f:
f.writelines('\n'.join(clean_lines))
</code></pre>