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<title>格式化字符串——时间 · Tugqi Biz
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<h1><a href="http://wbowam.github.io/ge-shi-hua-zi-fu-chuan-shi-jian.html"> 格式化字符串——时间 </a></h1>
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<p>之前介绍过<a href="http://tulpar008.github.io/ben-ban-fa-xue-python.html">格式化字符串</a> <br />
本篇专门介绍格式化字符串——时间 </p>
<hr />
<p>所有日期、时间的api都在datetime模块内。</p>
<h5 id="1-datetime-string">1. datetime => string<a class="headerlink" href="#1-datetime-string" title="Permanent link">¶</a></h5>
<div class="highlight"><pre><span class="n">now</span> <span class="o">=</span> <span class="n">datetime</span><span class="p">.</span><span class="n">datetime</span><span class="p">.</span><span class="n">now</span><span class="p">()</span>
<span class="n">now</span><span class="p">.</span><span class="n">strftime</span><span class="p">(</span><span class="err">'</span><span class="o">%</span><span class="n">Y</span><span class="o">-%</span><span class="n">m</span><span class="o">-%</span><span class="n">d</span> <span class="o">%</span><span class="n">H</span><span class="o">:%</span><span class="n">M</span><span class="o">:%</span><span class="n">S</span><span class="err">'</span><span class="p">)</span>
<span class="err">输出</span><span class="mi">2012</span><span class="o">-</span><span class="mo">03</span><span class="o">-</span><span class="mo">05</span> <span class="mi">16</span><span class="o">:</span><span class="mi">26</span><span class="o">:</span><span class="mf">23.870105</span>
</pre></div>
<p>strftime是datetime类的实例方法。</p>
<h5 id="2-string-datetime">2. string => datetime<a class="headerlink" href="#2-string-datetime" title="Permanent link">¶</a></h5>
<div class="highlight"><pre><span class="n">t_str</span> <span class="o">=</span> <span class="err">'</span><span class="mi">2012</span><span class="o">-</span><span class="mo">03</span><span class="o">-</span><span class="mo">05</span> <span class="mi">16</span><span class="o">:</span><span class="mi">26</span><span class="o">:</span><span class="mi">23</span><span class="err">'</span>
<span class="n">d</span> <span class="o">=</span> <span class="n">datetime</span><span class="p">.</span><span class="n">datetime</span><span class="p">.</span><span class="n">strptime</span><span class="p">(</span><span class="n">t_str</span><span class="p">,</span> <span class="err">'</span><span class="o">%</span><span class="n">Y</span><span class="o">-%</span><span class="n">m</span><span class="o">-%</span><span class="n">d</span> <span class="o">%</span><span class="n">H</span><span class="o">:%</span><span class="n">M</span><span class="o">:%</span><span class="n">S</span><span class="err">'</span><span class="p">)</span>
</pre></div>
<p>strptime是datetime类的静态方法。</p>
<h5 id="_1">有关时间的更多格式化字符串：<a class="headerlink" href="#_1" title="Permanent link">¶</a></h5>
<div class="highlight"><pre><span class="c">%a Abbreviated weekday name</span>
<span class="c">%A Full weekday name</span>
<span class="c">%b Abbreviated month name</span>
<span class="c">%B Full month name</span>
<span class="c">%c Date and time representation appropriate for locale</span>
<span class="c">%d Day of month as decimal number (01 - 31)</span>
<span class="c">%H Hour in 24-hour format (00 - 23)</span>
<span class="c">%I Hour in 12-hour format (01 - 12)</span>
<span class="c">%j Day of year as decimal number (001 - 366)</span>
<span class="c">%m Month as decimal number (01 - 12)</span>
<span class="c">%M Minute as decimal number (00 - 59)</span>
<span class="c">%p Current locale's A.M./P.M. indicator for 12-hour clock</span>
<span class="c">%S Second as decimal number (00 - 59)</span>
<span class="c">%U Week of year as decimal number, with Sunday as first day of week (00 - 51)</span>
<span class="c">%w Weekday as decimal number (0 - 6; Sunday is 0)</span>
<span class="c">%W Week of year as decimal number, with Monday as first day of week (00 - 51)</span>
<span class="c">%x Date representation for current locale</span>
<span class="c">%X Time representation for current locale</span>
<span class="c">%y Year without century, as decimal number (00 - 99)</span>
<span class="c">%Y Year with century, as decimal number</span>
<span class="c">%z, %Z Time-zone name or abbreviation; no characters if time zone is unknown</span>
<span class="c">%% Percent sign</span>
</pre></div>
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