擅长:python、mysql、java
<p>使用<strong><code>join</code></strong>和<strong><code>get_dummies</code></strong></p>
<pre><code>df.join(pd.get_dummies(df.log_type)).groupby(['srvr_name', 'hour']).sum().astype(bool)
impressionWin transactionWin
srvr_name hour
server1 18:00:00 True True
server2 18:00:00 True True
</code></pre>