擅长:python、mysql、java
<p>这在ipython笔记本中使用Python3实现</p>
<pre><code>import json
import pandas as pd
from pandas import *
import datetime
convert_hour = lambda x: datetime.datetime.strptime(x , '%H:%M %p').strftime('%H') if len(x) > 5 else datetime.datetime.strptime(x , '%I %p').strftime('%H')
df['hour'] = df['label'].apply(convert_hour)
convert_minute = lambda x: datetime.datetime.strptime(x , '%H:%M %p').strftime('%M') if len(x) > 5 else 0
df['minute2'] = df['label'].apply(convert_minute)
</code></pre>