为什么这个查找方法返回None并抛出错误?

Question

import requests
from bs4 import BeautifulSoup
import re
import pandas as pd
def tableData(data, attrs):
row = []

data = data.find(attrs=attrs)
tr = data.find_all('tr')
header = [ th.get_text(strip=True) for th in data.find_all('th') ]
if header:
row.append(header)
for tr in tr[1:]:
row.append([ td.get_text(strip=True) for td in tr.find_all('td')])
return row
url1 = 'https://www.nfl.com/standings/league/2019/REG'
page1 = requests.get(url1)
soup1 = BeautifulSoup(page1.text, 'lxml')
table = soup1.find('table', attrs={'summary': 'Standings - Detailed View'})
# print(table)
print(tableData(table, {'summary': 'Standings - Detailed View'}))

即使在调试器中，我也可以看到包含积分榜-详细视图的数据值但是当data.find(attrs=attrs)运行时，它似乎返回None

Answer 1

您已经有了表:table。它有行和所有东西，但它没有任何进一步的"排名"-详细视图。属性。直接进入

def tableData(data):#, attrs):
row = []    
#data = data.find(attrs=attrs)
tr = data.find_all('tr')

更好的方法是，使用pandas(反正是导入的)将表作为数据框架提取出来:

df = pd.read_html('https://www.nfl.com/standings/league/2019/REG')[0]