擅长:python、mysql、java
<p>你可以用一点<code>iloc</code>切片魔法来完成这项工作。你知道吗</p>
<pre><code>df['Max'] = df.iloc[:, 1:].max(axis=1)
df['Min'] = df.iloc[:, 1:].min(axis=1)
df['Max - Min'] = df['Max'] - df['Min']
</code></pre>
<p/>
<pre><code>df
County Year1 Year2 Year3 Year4 Max Min Max - Min
1 Autauga 54660 55253 51253 56253 56253 51253 5000
</code></pre>