擅长:python、mysql、java
<p>因为您将列表转换为字符串,但没有将其保存为任何变量,并且您正在返回列表iteslf</p>
<pre><code>def triple(text):
x = list(text)
for i in range(0, len(x)):
x[i] = x[i] + x[i] + x[i]
x =''.join(x)
return x
</code></pre>
<p>或者</p>
<pre><code>def triple(text):
x=list(text)
for i in range(0,len(x)):
x[i]=x[i]+x[i]+x[i]
x = ''.join(x)
return x
</code></pre>