擅长:python、mysql、java
<p>使用<code>groupby</code>+聚合<code>sum</code>:</p>
<pre><code>df['dollar_amount'] = df['dollar_amount'].astype(float)
a = df.groupby('buyer_code', as_index=False).sum()
print (a)
buyer_code dollar_amount
0 A 35000.000
1 B 670.749
2 C 600.000
</code></pre>