擅长:python、mysql、java
<p><a href="https://stackoverflow.com/a/53266061">arshajii's answer</a>可能是正确的,但是如果您还想让第一个<code>x</code>的值满足您的条件,您可以:</p>
<pre><code>try:
x = next(x for x in range(k) if B[x, 1] == 1)
# Do something with x
except StopIteration:
# Do something else
</code></pre>
<hr/>
<p>编辑:更好,谢谢@arshajii:</p>
^{pr2}$