在Python中遍历HTML树
<td id="aisd_calendar-2014-04-28-0" class="single-day future" colspan="1" rowspan="1" date="**2014-04-28**" >
<div class="inner">
<div class="item">
<div class="view-item view-item-aisd_calendar">
<div class="calendar monthview">
<div class="calendar.4168.field_date.8.0 contents">
<a href="/event/2013/regular-board-meeting">**Regular Board Meeting**</a> <span class="date-display-single">7:00 pm</span> </div>
<div class="cutoff"> </div>
</div>
</div>
</div> </div>
</td>
我有上面的HTML代码。我想从中提取“日期”标签（2014-04-28）和“a href”标签（定期董事会会议）。我该如何用Python来做到这一点？可以使用Beautiful Soup吗？
1 个回答
2
这里是如何通过 BeautifulSoup 来实现的：
from bs4 import BeautifulSoup
data = """
<html>
<body>
<td id="aisd_calendar-2014-04-28-0" class="single-day future" colspan="1" rowspan="1" date="**2014-04-28**" >
<div class="inner">
<div class="item">
<div class="view-item view-item-aisd_calendar">
<div class="calendar monthview">
<div class="calendar.4168.field_date.8.0 contents">
<a href="/event/2013/regular-board-meeting">**Regular Board Meeting**</a> <span class="date-display-single">7:00 pm</span> </div>
<div class="cutoff"> </div>
</div>
</div>
</div> </div>
</td>
</body>
</html>
"""
soup = BeautifulSoup(data)
td = soup.body.td # or soup.find('td', id='aisd_calendar-2014-04-28-0')
print td['date'].strip('*')
link = soup.find('div', {'class': 'contents'}).a
print link['href']
输出结果是：
2014-04-28
/event/2013/regular-board-meeting
另外，如果你需要把日期转换成 Python 的 datetime 格式，可以使用 strptime() 方法：
from datetime import datetime
...
datetime.strptime(td['date'].strip('*'), '%Y-%m-%d')
希望这能帮到你。