擅长:python、mysql、java
<p>根据您的澄清:</p>
<p>如果<code>lst1 = ["a", "b", "c"]</code>,<code>lst2 = ["a", "a", "a", "b", "b"]</code>,那么<code>output = {"a": 3, "b": 2}</code>,您只需执行以下操作:</p>
<pre><code>output = {}
for x in set(lst1):
cnt = lst2.count(x)
if cnt > 0:
output[x] = cnt
</code></pre>