擅长:python、mysql、java
<p>如果不关心项目顺序或重复,请使用<code>set</code>。如果需要,请使用<a href="http://docs.python.org/tutorial/datastructures.html#list-comprehensions" rel="noreferrer">list comprehensions</a>:</p>
<pre><code>>>> def diff(first, second):
second = set(second)
return [item for item in first if item not in second]
>>> diff(A, B)
[1, 3, 4]
>>> diff(B, A)
[5]
>>>
</code></pre>