擅长:python、mysql、java
<p>使用<a href="https://docs.python.org/2/library/datetime.html#datetime.datetime.replace" rel="nofollow">^{<cd1>}</a></p>
<pre><code>import datetime
list_dt = [ datetime.datetime(2011, 1, 1, 0, 0, 2),
datetime.datetime(2011, 1, 1, 0, 2, 2),
datetime.datetime(2011, 1, 1, 0, 27, 2),
datetime.datetime(2011, 1, 1, 1, 0, 2)]
adjust_dt = [dt.replace(minute=0, second=0) for dt in list_dt]
</code></pre>
<hr/>
<p>使用<a href="https://docs.python.org/2/library/collections.html#collections.Counter" rel="nofollow">^{<cd2>}</a>来计算频率</p>
^{pr2}$