擅长:python、mysql、java
<p>我猜你在找这样的东西:</p>
<pre><code>first = {'x':1, 'y':100, 'foo':'bar'}
second = dict(first, x=2, y=200) # {'y': 200, 'x': 2, 'foo': 'bar'}
</code></pre>
<p>见<a href="http://docs.python.org/library/stdtypes.html#dict">^{<cd1>}</a></p>