擅长:python、mysql、java
<p>尝试列表理解:</p>
<pre><code>lst = [a[i:i+3] + b[i:i+3] for i in range(0, len(a), 3)]
result = [i for s in lst for i in s]
print (result)
</code></pre>
<p><strong>回答</strong></p>
<pre><code>[1, 2, 3, 'a', 'b', 'c', 4, 5, 6, 'd', 'e', 'f', 7, 8, 9, 'g', 'h', 'i']
</code></pre>