擅长:python、mysql、java
<p>在交互式解释器(仅限于)中,可以使用<a href="http://docs.python.org/2/reference/lexical_analysis.html#reserved-classes-of-identifiers" rel="nofollow">the special identifier ^{<cd1>}</a>,它存储上一次求值的结果:</p>
<pre><code>>>> {'Foo':{'LG.ip': {'NKCells': 3.4439999999999995, 'DendriticCells': 8.3127499999999994, 'Macrophages': 12.146249999999998}}}
{'Foo': {'LG.ip': {'NKCells': 3.4439999999999995, 'DendriticCells': 8.31275, 'Macrophages': 12.146249999999998}}}
>>> _['Foo']['LG.ip']['NKCells']
3.4439999999999995
</code></pre>