擅长:python、mysql、java
<p>可能考虑过作弊,但是python3.5 <a href="https://docs.python.org/3/whatsnew/3.5.html#whatsnew-pep-465" rel="nofollow noreferrer">added a matrix multiply operator</a>用来计算点积,而不实际调用<code>np.dot</code>:</p>
<pre><code>>>> arr1 = np.array([1,2,3])
>>> arr2 = np.array([3,4,5])
>>> arr1 @ arr2
26
</code></pre>
<p>问题解决了!在</p>