擅长:python、mysql、java
<p>你可以这样做:</p>
<pre><code>In [90]: df1['price'] /= df1['date'].map(df2.set_index('date')['rate'])
In [91]: df1
Out[91]:
index date price
0 0 2011 10000.000000
1 1 2011 11000.000000
2 2 2012 6000.000000
3 3 2013 4333.333333
</code></pre>