擅长:python、mysql、java
<p>将<code>pandas.Series.groupby</code>与<code>count</code>一起使用:</p>
<pre><code>s = pd.Series(ContinentDict, name="Country")
s.groupby(s).count()
</code></pre>
<p>输出:</p>
<pre><code>Country
Asia 5
Australia 1
Europe 6
North America 2
South America 1
Name: Country, dtype: int64
</code></pre>