擅长:python、mysql、java
<p>对于后代:从<a href="http://pandas.pydata.org/pandas-docs/dev/whatsnew.html#v0-15-0-october-18-2014" rel="noreferrer">0.15.0</a>开始,有一个方便的<a href="http://pandas.pydata.org/pandas-docs/stable/basics.html#basics-dt-accessors" rel="noreferrer">.dt accessor</a>可用于从日期时间/周期序列中提取此类值(在上述情况下,仅<code>sales.timestamp.dt.hour</code>!</p>