擅长:python、mysql、java
<p>看起来您有一个<a href="https://pandas.pydata.org/pandas-docs/version/0.23.4/generated/pandas.DatetimeIndex.html" rel="nofollow noreferrer">DatetimeIndex</a>,您可以尝试使用<a href="https://pandas.pydata.org/pandas-docs/version/0.23.4/generated/pandas.DatetimeIndex.strftime.html" rel="nofollow noreferrer">strftime</a></p>
<pre><code>DailyPrice.index = DailyPrice.index.strftime('%Y-%m-%d')
</code></pre>