擅长:python、mysql、java
<p>使用<a href="https://docs.python.org/3/library/functions.html#enumerate" rel="nofollow noreferrer">^{<cd1>}</a>将起始值指定为<code>1</code>:</p>
<pre><code>listo = [[1,2],[3,4,5]]
for i, x in enumerate(listo, 1):
if 3 in x:
print(i)
# 2
</code></pre>