擅长:python、mysql、java
<p>可以使用集合数据结构而不是列表。
默认情况下,集合包含唯一值。在</p>
<p><strong>来自Python Docs</strong></p>
<p><a href="https://docs.python.org/2/library/sets.html" rel="nofollow noreferrer">https://docs.python.org/2/library/sets.html</a></p>
<blockquote>
<p>The sets module provides classes for constructing and manipulating unordered collections of <strong>unique elements</strong>. Common uses include membership testing, <strong>removing duplicates</strong> from a sequence, and computing standard math operations on sets such as intersection, union, difference, and symmetric difference.</p>
</blockquote>
<p><strong>示例</strong></p>
<pre><code>my_set = set([1,2,3,2])
print(my_set) # prints [1,2,3]
my_set.add(4)
print(my_set) # prints [1,2,3,4]
my_set.add(3)
print(my_set) # prints [1,2,3,4]
</code></pre>