擅长:python、mysql、java
<p>您需要将<code>.lower()</code>和<code>.upper()</code>分配给变量,例如:</p>
<pre><code>begining = begining.lower()
end = end.upper()
example = begining + end
</code></pre>
<p>或者在你的情况下:</p>
<pre><code>def sillycase(example):
begining = example[:len(example) // 2].lower()
end = example[len(example) // 2:].upper()
example = begining + end
return example
</code></pre>