擅长:python、mysql、java
<pre><code>In [16]: from collections import Counter
In [17]: keepers = [a[0] for a in Counter(d[1] for d in data).items() if a[1]>=3]
In [18]: [d for d in data if d[1] in keepers]
Out[18]:
[['Biz_Innovations', '#socialmedia'],
['ChantalGrange', '#aws'],
['beyonddevops', '#aws'],
['beyonddevops', '#socialmedia'],
['bigdataweek', '#socialmedia'],
['sabumjung', '#aws']]
</code></pre>