通过Python从URL抓取数据时发生AttributeError

Question

我正在使用下面的代码尝试从此URL中的表中提取数据。 我在这里问了同样的问题，并得到了答案。 但是，尽管当时Answer的代码在起作用，但我现在已经意识到代码中的data尚未定义，因此下面的代码会导致错误AttributeError: 'NoneType' object has no attribute 'text'在final = [[t.th.text] + [ele.text for ele in t.find_all("td")] for t in h[-1].find_all_next("tr")]行final = [[t.th.text] + [ele.text for ele in t.find_all("td")] for t in h[-1].find_all_next("tr")] 。 我问过用户什么data ，但是我自己却无法弄清楚，因此希望在这方面有所帮助。

from bs4 import BeautifulSoup
import requests
from itertools import islice
import pandas as pd

r = requests.get(
    "http://www.federalreserve.gov/econresdata/researchdata/feds200628_1.html")
soup = BeautifulSoup(r.content)

h = data.find_all("th", scope="col") #Issue
final = [[t.th.text] + [ele.text for ele in t.find_all("td")] for t in h[-1].find_all_next("tr")]
headers = [th.text for th in h]

headers.insert(0,"dates")
df = pd.DataFrame(final,columns=headers)

print df

Answer 1

from bs4 import BeautifulSoup
import requests
from itertools import islice

r = requests.get(
    "http://www.federalreserve.gov/econresdata/researchdata/feds200628_1.html")
soup = BeautifulSoup(r.content)

data = soup.find('table', attrs={'rules': 'all'})
h = data.find_all("th", scope="col") #Issue
final = [[t.th.text] + [ele.text for ele in t.find_all("td")] for t in h[-1].find_all_next("tr")]
headers = [th.text for th in h]