<p>当我在看pycon的视频时,我很困惑。
<a href="https://www.youtube.com/watch?v=_AEJHKGk9ns" rel="nofollow noreferrer">https://www.youtube.com/watch?v=_AEJHKGk9ns</a></p>
<pre><code>num = [1,2,3]
for x in num:
x=x*3
print(num)
</code></pre>
<p>这个打印1,2,3</p>
<pre><code>new_list=[]
for x in range(len(num))
new_list = x[num]*3 + new_list[]
</code></pre>
<p>我要3,6,9</p>