如何找到包含具有特定类的标签的所有标签？数据为：
<tr>
<td class="TDo1" width=17%>Tournament</td>
<td class="TDo2" width=8%>Date</td>
<td class="TDo2" width=6%>Pts.</td>
<td class="TDo2" width=34%>Pos. Player (team)</td>
<td class="TDo5" width=35%>Pos. Opponent (team)</td>
</tr>
<tr>
<td class=TDq1><a href="p.pl?t=410">GpWl(op) 4.01/02</a></td>
<td class=TDq2><a href="p.pl?t=410&r=4">17.02.02</a></td>
<td class=TDq3>34/75</td>
<td class=TDq5>39. John Deep</td>
<td class=TDq9>68. <a href="p.pl?ply=1229">Mark Deep</a></td>
</tr>
<tr>
<td class=TDp1><a href="p.pl?t=410">GpWl(op) 4.01/02</a></td>
<td class=TDp2><a href="p.pl?t=410&r=4">17.02.02</a></td>
<td class=TDp3>34/75</td>
<td class=TDp6>39. John Deep</td>
<td class=TDp8>7. <a href="p.pl?ply=10">Darius Star</a></td>
</tr>
我正在尝试
for mtable in bs.find_all('tr', text=re.compile(r'class=TD?3')):
print(mtable)
但这返回的结果为零。
我想您想找到所有包含任何类别为TD<any character>3:的标签的<tr>
import re
# `html` contains your html from the question
soup = BeautifulSoup(html, "html.parser")
pat = re.compile(r"TD.3")
for tr in soup.find_all(
lambda tag: tag.name == "tr"
and tag.find(class_=lambda cl: cl and pat.match(cl))
):
print(tr)
打印：
<tr>
<td class="TDq1"><a href="p.pl?t=410">GpWl(op) 4.01/02</a></td>
<td class="TDq2"><a href="p.pl?t=410&r=4">17.02.02</a></td>
<td class="TDq3">34/75</td>
<td class="TDq5">39. John Deep</td>
<td class="TDq9">68. <a href="p.pl?ply=1229">Mark Deep</a></td>
</tr>
<tr>
<td class="TDp1"><a href="p.pl?t=410">GpWl(op) 4.01/02</a></td>
<td class="TDp2"><a href="p.pl?t=410&r=4">17.02.02</a></td>
<td class="TDp3">34/75</td>
<td class="TDp6">39. John Deep</td>
<td class="TDp8">7. <a href="p.pl?ply=10">Darius Star</a></td>
</tr>
您需要找到与td匹配的内容。像这样，
In [1]: bs.find_all('td', {"class": re.compile(r'TDwd')})
Out[1]:
[<td class="TDo1" width="17%">Tournament</td>,
<td class="TDo2" width="8%">Date</td>,
<td class="TDo2" width="6%">Pts.</td>,
<td class="TDo2" width="34%">Pos. Player (team)</td>,
<td class="TDo5" width="35%">Pos. Opponent (team)</td>,
<td class="TDq1"><a href="p.pl?t=410">GpWl(op) 4.01/02</a></td>,
<td class="TDq2"><a href="p.pl?t=410&r=4">17.02.02</a></td>,
<td class="TDq3">34/75</td>,
<td class="TDq5">39. John Deep</td>,
<td class="TDq9">68. <a href="p.pl?ply=1229">Mark Deep</a></td>,
<td class="TDp1"><a href="p.pl?t=410">GpWl(op) 4.01/02</a></td>,
<td class="TDp2"><a href="p.pl?t=410&r=4">17.02.02</a></td>,
<td class="TDp3">34/75</td>,
<td class="TDp6">39. John Deep</td>,
<td class="TDp8">7. <a href="p.pl?ply=10">Darius Star</a></td>]
这可能会对您有所帮助：
from bs4 import BeautifulSoup
import re
t = 'your page source'
pat = re.compile(r'class=TD.3')
classes = re.findall(pat,t)
classes = [j[6:] for j in classes]
soup = BeautifulSoup(t)
result = list()
for i in classes:
item = soup.find_all(attrs={"class": i})
result.extend(item)
for i in result:
print(i.parent)
您可以使用css选择器获取带有class = "TD...3"的标签，然后获取它们的父标签
mtables = [s.parent for s in bs.select('*[class^="TD"][class$="3"]')]
# if you want tr only:
# mtables = [s.parent for s in bs.select('tr *[class^="TD"][class$="3"]')]
mtables = list(set(mtables)) # no duplicates
但如果有多个类(除非第一个以"TD"开头，最后一个以"3"结尾(，并且不能限制其间的字符，则这将不起作用。
你可以像这个一样两次使用find和lambda
tagPat = '^TD.3$'
# tagPat = '^TD.*3$' # if there might be more than one character between TD and 3
mtables = bs.find_all(
lambda p:
p.name == 'tr' and # remove if you want all tags and not just tr
p.find(
lambda t: t.get('class') is not None and
len([c for c in t.get('class') if re.search('^TD.3$', c)]) > 0
, recursive=False # prevent getting <tr><tr><td class="TDo3">someval</td></tr></tr>
))
如果不想使用lambda，可以用regex和find替换第一个方法中的select
tagPat = '^TD.3$' # '^TD.*3$' #
mtables = [
s.parent for s in bs.find_all(class_ = re.compile(tagPat))
if s.parent.name == 'tr' # remove if you want all tags and not just tr
]
mtables = list(set(mtables)) # no duplicates
对于您问题中的html，所有3种方法都会导致相同的数据-您可以使用打印
for mtable in mtables: print('---n', mtable, 'n---')
并获得输出
---
<tr>
<td class="TDq1"><a href="p.pl?t=410">GpWl(op) 4.01/02</a></td>
<td class="TDq2"><a href="p.pl?t=410&r=4">17.02.02</a></td>
<td class="TDq3">34/75</td>
<td class="TDq5">39. John Deep</td>
<td class="TDq9">68. <a href="p.pl?ply=1229">Mark Deep</a></td>
</tr>
---
---
<tr>
<td class="TDp1"><a href="p.pl?t=410">GpWl(op) 4.01/02</a></td>
<td class="TDp2"><a href="p.pl?t=410&r=4">17.02.02</a></td>
<td class="TDp3">34/75</td>
<td class="TDp6">39. John Deep</td>
<td class="TDp8">7. <a href="p.pl?ply=10">Darius Star</a></td>
</tr>
---