擅长:python、mysql、java
<p>不确定是否有内置的<code>pandas</code>,但是在Python中,您可以获得“Julian”日,例如:</p>
<pre><code>data['openDay'] = [int(format(dt, '%j')) for dt in data['dateOpen']]
</code></pre>
<p>示例:</p>
<pre><code>>>> from datetime import datetime
>>> int(format(datetime(2013,2,21), '%j'))
52
</code></pre>