擅长:python、mysql、java
<p>从<a href="https://docs.python.org/3.5/library/datetime.html#strftime-strptime-behavior" rel="nofollow">docs</a>(见底部注释7):</p>
<blockquote>
<p>When used with the <code>strptime()</code> method, <code>%U</code> and <code>%W</code> are only used in
calculations when the day of the week and the year are specified.</p>
</blockquote>
<p>因此,只要不指定工作日,就可以得到与<code>datetime.strptime('2016', '%Y')</code>相同的结果。在</p>