擅长:python、mysql、java
<pre><code>>>> my_list = [4 ,1 ,2 ,3]
>>> my_list * 2
[4, 1, 2, 3, 4, 1, 2, 3]
</code></pre>
<p>编辑:我在下面的评论和第二个例子之后更新我的答案</p>
<pre><code>my_list = [4 ,1 ,2 ,3 ,3 ,4 ,4 ,5]
frequency = {}
for elem in my_list:
if elem in frequency:
frequency [elem] += 1
else:
frequency [elem] = 1
items_to_append = []
for elem in my_list:
if frequency [elem] == 1:
items_to_append.append (elem)
my_list.extend (items_to_append)
</code></pre>