列表索引超出范围是来自书

Question

from bs4 import BeautifulSoup
import requests

url = 'http://new.cpc.com.tw/division/mb/oil-more4.aspx'

html = requests.get(url).text
sp = BeautifulSoup(html, 'html.parser')
data = sp.find_all('span', {'id':'Showtd'})
rows = data[0].find_all('tr')

prices = list()
for row in rows:
    cols = row.find_all('td')
    if len(cols[1].text) > 0:
       item = [cols[0].text, cols[1].text,cols[2].text, cols[3].text]
        prices.append(item)
for p in prices:
    print(p)

我收到如下错误：

>IndexError                                Traceback (most recent call >last)
><ipython-input-4-0e950be61842> in <module>()
 >    10 sp = BeautifulSoup(html, 'html.parser')
 >    11 data = sp.find_all('span', {'id':'Showtd'})
>---> 12 rows = data[0].find_all('tr')
 >    13 
 >   14 prices = list()

>IndexError: list index out of range

Answer 1

更改此

url = 'http://new.cpc.com.tw/division/mb/oil-more4.aspx'

到

url = 'https://new.cpc.com.tw/division/mb/oil-more4.aspx'

否则，实际响应会显示有关SSL重定向的信息（根本不返回任何表，也不是您预期的页面）。适合我