擅长:python、mysql、java
<p>这里是一个熊猫指数的方法。我们不需要循环(或列表理解),因为索引包含一个<code>difference()</code>方法</p>
<pre><code>import pandas as pd
data = {"countries": ["Australia", "France", "Belgium"]}
index_list = ["Germany", "USA", "Ireland", "Australia", "France",
"Belgium", "Kenya", "Spain"]
result = pd.Index(index_list).difference(data['countries']).to_list()
print(result)
['Germany', 'Ireland', 'Kenya', 'Spain', 'USA']
</code></pre>