随机模块 random

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          <h3 id="python">《Python 教程》授课笔记附件</h3>
<ul>
<li>讲师: 魏明择</li>
<li>时间: 2019</li>
</ul>
<h3 id="random">随机模块 random</h3>
<h4 id="_1">作用：</h4>
<h5 id="_2">用于模拟或生成随机输出的模块.</h5>
<h4 id="_3">用法示意:</h4>
<div class="codehilite"><pre>import random as R
</pre></div>

<table>
<thead>
<tr>
<th>函数名</th>
<th>描述</th>
</tr>
</thead>
<tbody>
<tr>
<td>R.random()</td>
<td>返回一个[0, 1) 之间的随机实数</td>
</tr>
<tr>
<td>R.uniform(a,b)</td>
<td>返回[a,b] 区间内的随机实数</td>
</tr>
<tr>
<td>R.randint(a, b)</td>
<td>返回在[a, b]范围内的整数(包含a,b)</td>
</tr>
<tr>
<td>R.randrange([start,] stop[, step])</td>
<td>返回range(start,stop,step)中的随机数</td>
</tr>
<tr>
<td>R.choice(seq)</td>
<td>从序列中返回随意元素</td>
</tr>
<tr>
<td>R.shuffle(seq[, random])</td>
<td>随机指定序列的顺序(乱序序列）</td>
</tr>
<tr>
<td>R.sample(seq,n)</td>
<td>从序列中选择n个随机且不重复的元素</td>
</tr>
</tbody>
</table>

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