我希望修改现有代码,该代码当前可解析网页源的td
个属性,并将其替换为value
字段的option
等于一个数值。让我解释一下
import requests, re, collections
from bs4 import BeautifulSoup
def get_content(url):
if type(url) != str:
print('You need to included a string')
exit()
else:
headers = {
'User-Agent': 'Mozilla/5.0 (Windows NT 6.3; rv:36.0) Gecko/20100101 Firefox/36.0',
'From': 'user@umbc.edu'
}
req = requests.get(url,headers=headers)
soup = BeautifulSoup(req.content, 'html.parser')
current_month=soup.find_all('td', {'id': 'monatevent'})
fwk_nextmonth=soup.find_all('td', {'id': 'aevent'})
curr_month = []
fwk_next_month = []
我现在想解析以下select
option
属性,以在option value=08
时发出警报,例如:
<select name="month" onchange="submit()">
<option value="09" selected="">09</option>
<option value="10">10</option><option value="11">11</option>
</select>
如果我在代码中使用以下选择器,则不会返回任何内容: current_month = soup.find_all('select',{'option':'08'})
有人可以帮忙吗?谢谢。
答案 0 :(得分:1)
您可以使用BeautifulSoup中内置的CSS选择器。选择器<option>
将找到具有属性selected
的标签data = """<select name="month" onchange="submit()">
<option value="09" selected="">09</option>
<option value="10">10</option><option value="11">11</option>
</select>"""
from bs4 import BeautifulSoup
soup = BeautifulSoup(data, 'lxml')
print(soup.select_one('option[selected]').text)
:
09
打印:
If you want to find option with value=08, you can do CSS selector `option[value=08]`:
data = """<select name="month" onchange="submit()">
<option value="08">08</option>
<option value="09" selected="">09</option>
<option value="10">10</option><option value="11">11</option>
</select>"""
from bs4 import BeautifulSoup
soup = BeautifulSoup(data, 'lxml')
print(soup.select_one('option[value=08]'))
编辑:
<option value="08">08</option>
打印:
{{1}}
答案 1 :(得分:0)
我认为您尝试从html字符串中查找所选选项的值。 可能是这个帮助。
from bs4 import BeautifulSoup
html_str = """<select name="month" onchange="submit()">
<option value="09" selected="">09</option>
<option value="10">10</option><option value="11">11</option>
</select>"""
soup = BeautifulSoup(html_str, 'html.parser')
select = soup.find('select')
for option in select.find_all('option'):
if option.has_attr('selected'):
print('Value:', option.get('value'))