擅长:python、mysql、java
<p>我相信你可以用<a href="https://docs.python.org/3/library/collections.html#collections.OrderedDict" rel="nofollow noreferrer">OrderedDict's move_to_end to do this.</a></p>
<pre><code>dict = OrderedDict.fromkeys("qwerty")
dict.move_to_end("t", last=False)
"".join(dict.keys())
"tqwery"
</code></pre>