擅长:python、mysql、java
<p>我认为您需要由连接词和拆分词创建的集合长度:</p>
<pre><code>a = len(set(' '.join(df['words']).split()))
print (a)
7
</code></pre>
<p>如果有使用集合理解的列表,谢谢@juanpa.arrivillaga:</p>
<pre><code>print (df)
words
0 [we, like, to, party]
1 [can, can, dance]
2 [yes, we, can]
a = len({y for x in df['words'] for y in x})
print (a)
7
</code></pre>