python - BeautifulSoup - 属性错误: 'NavigableString' object has no attribute 'find_all'

Question

尝试让此脚本迭代 html 文件并打印出所需的结果。它一直给我这个错误。当表中只有一场“游戏”时，它可以正常工作，但如果有多个“游戏”，它就会崩溃。尝试修复它，以便它可以迭代多个游戏/ parking 票，但因此无法继续。

Traceback (most recent call last):
  File "C:/Users/desktop/Desktop/tabletest.py", line 11, in <module>
    for rows in table.find_all('tr'):
  File "C:\Program Files\Python36\lib\site-packages\bs4\element.py", line 737, in __getattr__
    self.__class__.__name__, attr))
AttributeError: 'NavigableString' object has no attribute 'find_all'

这是我的代码:

import pandas as pd
from bs4 import BeautifulSoup
import requests
import lxml.html as lh


with open("htmltabletest.html", encoding="utf-8") as f:
    data = f.read()
    soup = BeautifulSoup(data, 'lxml')
    for table in soup.find('table', attrs={'id': 'eventSearchTable'}):
        for rows in table.find_all('tr'):
            cols = table.find_all('td')

            empty = cols[0].get_text()
            eventdate = cols[1].get_text()
            eventname = cols[2].get_text()
            tickslisted = cols[3].get_text()
            pricerange = cols[4].get_text()

            entry = (empty, eventdate, eventname, tickslisted, pricerange)

            print(entry)

这是 html 文件中的内容:

<table class="dataTable st-alternateRows" id="eventSearchTable">
<thead>
<tr>
<th id="th-es-rb"><div class="dt-th"> </div></th>
<th id="th-es-ed"><div class="dt-th"><span class="th-divider"> </span>Event date<br/>Time (local)</div></th>
<th id="th-es-en"><div class="dt-th"><span class="th-divider"> </span>Event name<br/>Venue</div></th>
<th id="th-es-ti"><div class="dt-th"><span class="th-divider"> </span>Tickets<br/>listed</div></th>
<th id="th-es-pr"><div class="dt-th es-lastCell"><span class="th-divider"> </span>Price<br/>range</div></th>
</tr>
</thead>
<tbody class="" id="eventSearchTbody"><tr class="even" id="r-se-103577924">
<td class="nowrap"><input class="es-selectedEvent" id="se-103577924-check" name="selectEvent" type="radio"/></td>
<td class="nowrap" id="se-103577924-eventDateTime">Thu, 10/11/2018<br/>8:20 p.m.</td>
<td><div><a class="ellip" href="services/priceanalysis?eventId=103577924&amp;sectionId=0" id="se-103577924-eventName" target="_blank">Philadelphia Eagles at New York Giants</a></div><div id="se-103577924-venue">MetLife Stadium, East Rutherford, NJ</div></td>
<td id="se-103577924-nrTickets">6655</td>
<td class="es-lastCell nowrap" id="se-103577924-priceRange"><span id="se-103577924-minPrice">$134.50</span>  to<br/><span id="se-103577924-maxPrice">$2,222.50</span></td>
</tr><tr class="odd" id="r-se-103577925">
<td class="nowrap"><input class="es-selectedEvent" id="se-103577925-check" name="selectEvent" type="radio"/></td>
<td class="nowrap" id="se-103577925-eventDateTime">Thu, 10/11/2018<br/>8:21 p.m.</td>
<td><div><a class="ellip" href="services/priceanalysis?eventId=103577925&amp;sectionId=0" id="se-103577925-eventName" target="_blank">PARKING PASSES ONLY Philadelphia Eagles at New York Giants</a></div><div id="se-103577925-venue">MetLife Stadium Parking Lots, East Rutherford, NJ</div></td>
<td id="se-103577925-nrTickets">929</td>
<td class="es-lastCell nowrap" id="se-103577925-priceRange"><span id="se-103577925-minPrice">$20.39</span>  to<br/><span id="se-103577925-maxPrice">$3,602.50</span></td>
</tr></tbody>
</table>

Answer 1

错误在于您在表上迭代的方式，更具体地说是在以下行:

for table in soup.find('table', attrs={'id': 'eventSearchTable'}):

如果你想迭代，你应该使用find_all。事实上，如果你看看这两个方法返回值的类型:

print(type(soup.find('table', attrs={'id': 'eventSearchTable'})))
# <class 'bs4.element.Tag'>
print(type(soup.find_all('table', attrs={'id': 'eventSearchTable'})))
# <class 'bs4.element.ResultSet'>

在第一种情况下，您有一个表，在第二种情况下，有一组表(在您的情况下仅由 1 个表组成)，每个表的类型均为 bs4.element.Tag。

因此，您有两个选择，要么使用

table = soup.find('table', attrs={'id': 'eventSearchTable'})

或

for table in soup.find_all("table", {"id":"eventSearchTable"}):