擅长:python、mysql、java
<p>您还需要在<code>or</code>命令的另一端指定相等性测试:</p>
<pre><code>if choose == "A" or choose == "a":
print("Ascending order: ", Anewlist)
</code></pre>
<p>或者,将<code>choose</code>变量设为大写:</p>
<pre><code>if choose.upper() == "A":
print("Ascending order: ", Anewlist)
</code></pre>