我无法获得 BeautifulSoup 命令的分辨率

Question

我已经开始使用 BeautifulSoup yet.I 制作了这样的脚本：

import bs4
import requests
from bs4 import BeautifulSoup


def parsePrice():    
    r=requests.get('https://steamcommunity.com/market/listings/440/Mann%20Co.%20Supply%20Crate%20Key')
    soup=bs4.BeautifulSoup(r.text,"xml")
    price=soup.find_all('span',{'class':'market_commodity_orders_header_promote'})[0].find('span').text
    return price

while True:
    print('the current price: '+str(parsePrice()))

当我点击运行按钮时，它显示错误，

 runfile('C:/Users/tuck/.spyder-py3/temp.py', wdir='C:/Users/tuck/.spyder-py3')
    Traceback (most recent call last):

   File "C:\Users\tuck\.spyder-py3\temp.py", line 15, in <module>
    print('the current price: '+str(parsePrice()))

  File "C:\Users\tuck\.spyder-py3\temp.py", line 11, in parsePrice
    price=soup.find_all('span',{'class':'market_commodity_orders_header_promote'})[0].find('span').text

IndexError: list index out of range

所需输出的图像：

Answer 1

是的，内容是动态加载的，所以你可以先去做什么 chrome 开发人员并找到网络选项卡并转到 xhr 选项卡
然后刷新您的站点，现在您可以在名称选项卡中看到 link 存在现在点击 links 并找到你的数据
所以它包含json数据现在你可以复制link的link地址其中包含正确的信息，我还添加了图像以便更好地理解

import requests
from bs4 import BeautifulSoup
r=requests.get('https://steamcommunity.com/market/itemordershistogram?country=IN&language=english&currency=1&item_nameid=1&two_factor=0') 
main_data=r.json()
html=main_data['sell_order_summary']

soup=BeautifulSoup(html,"html.parser")
soup.text

输出：

'10079 for sale starting at .47'

图片：

我无法获得 BeautifulSoup 命令的分辨率

I cant get the resulation of BeautifulSoup commant

python

beautifulsoup

spyder