擅长:python、mysql、java
<p>你很接近了!<a href="https://docs.python.org/2/library/stdtypes.html#str.replace" rel="nofollow">^{<cd1>}</a>不能“就地”工作;它返回一个新字符串,该字符串已对其执行了请求的替换。在</p>
<blockquote>
<p><strong>Return a copy of the string</strong> with all occurrences of substring old replaced by new. If the optional argument count is given, only the first count occurrences are replaced.</p>
</blockquote>
<p>请执行以下操作:</p>
<pre><code>def song_decoder(song):
song = song.replace("WUB", " ")
return " ".join(song.split())
</code></pre>
<p>例如:</p>
^{2}$