擅长:python、mysql、java
<pre><code>import pandas as pd
bnames_decade = pd.DataFrame([['F','Emma',121375],['F','Sophia',117352],['F','Olivia',111691],['M','Noah',110280],['M','Mason',105104],['F','Isabella',103947], ['F','Isabella2',103946],['F','Isabella3',103945],['F','Isabella4',103944],['M','Isabella5',103943],['M','Isabella6',103942],['M','Isabella7',103941],['M','Isabella8',103940]], columns=['sex','name','births'])
print(bnames_decade)
</code></pre>
<p><a href="https://i.stack.imgur.com/WmlOq.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/WmlOq.png" alt="enter image description here"/></a></p>
<pre><code>for key, group in bnames_decade.groupby(['sex']):
print(group['name'].iloc[0:5])
</code></pre>
<p><a href="https://i.stack.imgur.com/ZmipV.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/ZmipV.png" alt="enter image description here"/></a></p>