擅长:python、mysql、java
<p>这是<code>pivot_table</code>的典型示例:</p>
<pre><code>>>> df.pivot_table(values='q_visits', cols='q_date', rows='q_string')
q_date 2012-10-02 00:00:00
q_string
current 280
molecular 259
neuron 364
nucleus 1790
stem 201
</code></pre>