擅长:python、mysql、java
<p>试试这个,看看它是否有效-</p>
<pre><code>df = data_2015.groupby(['paymentDate']).agg(mean_payment=('paymentAmount', 'mean'), mean_loan=('loanAmount', 'mean')).reset_index()
df.columns = ['Payment Date', 'Payment Amount', 'Loan Amount']
</code></pre>