擅长:python、mysql、java
<p>另一种方式:</p>
<pre><code>>>> LofD=[{'amt': 400, 'name': 'whatever1'}, {'amt': 300, 'name': 'whatever3'}, {'amt': 500, 'name': 'whatever2'}]
>>> SumofAmt=0
>>> for each in LofD:
... SumofAmt+=each['amt']
...
>>> SumofAmt
1200
</code></pre>