擅长:python、mysql、java
<p>您可以使用熊猫快速完成此操作:</p>
<pre><code>import pandas as pd
data=[['viola.jpg', '0.81', '1.0693461723', '100'],
['viola.jpg', '0.44', '1.31469086921', '18'],
['viola.jpg', '0.8', '3.92096084523', '73'],
['vlasta.jpg', '0.88', '1.36559123399', '110'],
['vlasta.jpg', '0.88', '1.88126493001', '45'],
['vlasta.jpg', '0.76', '1.0510328514', '88']]
df = pd.DataFrame(data, dtype=float)
print df.groupby(0).mean()
</code></pre>
<p>结果:</p>
^{pr2}$