></i><b>4</b> NumPy基础：数组和矢量计算</a><ul>
<li class="chapter" data-level="4.1" data-path="numpy.html"><a href="numpy.html"><i class="fa fa-check"></i><b>4.1</b> NumPy的ndarray：一种多维数组对象</a></li>
<li class="chapter" data-level="4.2" data-path="numpy.html"><a href="numpy.html#section-4.2"><i class="fa fa-check"></i><b>4.2</b> 通用函数：快速的元素级数组函数</a></li>
<li class="chapter" data-level="4.3" data-path="numpy.html"><a href="numpy.html#section-4.3"><i c