擅长:python、mysql、java
<p>使用<a href="http://www.numpy.org/" rel="nofollow noreferrer">^{<cd1>}</a>可以使用<a href="https://docs.scipy.org/doc/numpy-1.12.0/reference/arrays.indexing.html#boolean-array-indexing" rel="nofollow noreferrer">index masks</a>:</p>
<pre><code>var = numpy.array([...])
var[var < 0] = 0
</code></pre>