擅长:python、mysql、java
<p>您可以将<code>int</code>强制转换为<code>str</code>并选中<code>len()</code>,即:</p>
<pre><code>SLR = [4, 4000, 4010]
if [x for x in SLR if len(str(x)) == 1]:
print("yes")
</code></pre>
<p><a href="https://trinket.io/python3/2b31a3ea3d" rel="nofollow noreferrer">Demo</a></p>
<hr/>
<p>或者像<a href="https://stackoverflow.com/users/12299000/kaya3">@kaya3</a>建议的那样利用<a href="https://stackoverflow.com/a/14892812/797495">short-circuiting</a>:</p>
<pre><code>if any(len(str(x)) == 1 for x in SLR):
print("yes")
</code></pre>
<p>要与负数一起使用:</p>
<pre><code>SLR = [-9, 22, 4000, 4010]
if any(-10 < n < 10 for n in SLR):
print("yes")
</code></pre>