擅长:python、mysql、java
<p>试试这个</p>
<pre class="lang-py prettyprint-override"><code>f = open("testfile.txt", "r")
text=f.read()
f.close()
f=open("testfile.txt", "w+")
text2=''
if ' ' in text:
text2 = text.replace(' ' , '\n')
print(text2)
f.write(text2)
f.close()
</code></pre>