擅长:python、mysql、java
<p>Python字典没有任何顺序。你知道吗</p>
<p>从<a href="http://docs.python.org/2/tutorial/datastructures.html" rel="nofollow">docs</a>:</p>
<blockquote>
<p>It is best to think of a dictionary as an unordered set of key: value pairs, with the requirement that the keys are unique (within one dictionary).</p>
</blockquote>
<p>如果你读得更深入</p>
<blockquote>
<p>The keys() method of a dictionary object returns a list of all the keys used in the dictionary, in arbitrary order (if you want it sorted, just apply the sorted() function to it).</p>
</blockquote>
<p>所以您可以使用<a href="http://docs.python.org/2/library/functions.html#sorted" rel="nofollow">sorted</a>函数或<a href="http://docs.python.org/2/library/collections.html#collections.OrderedDict" rel="nofollow">OrderedDict</a>。你知道吗</p>