为什么第28行显示无法调用

from urllib.request import Request, urlopen
import ssl
from bs4 import BeautifulSoup
import pandas as pd

url = 'https://www.abc.net.au/news/justin'

#################################################
#################################################
### 

headers={'User-Agent': 'Mozilla/5.0 (Macinstosh; Intel Mac OS X 10_10_1) AppleWebKit/537.36(KHTML, like Gecko) Chrome/39.0.2171.95 Safari/537.36'}
req = Request(url, headers=headers)
context = ssl._create_unverified_context()

uClient= urlopen(req, context=context)
html = uClient.read() 
uClient.close()

#################################################
#################################################

soup = BeautifulSoup(html, 'html.parser')
maindiv = soup.find('div',class_="JustInPaginationList")

dataset = []

for item in maindiv('a'):
	title = item.find('p').getText()
	url = item['href']
	print(title)
	print(url)
	print()

	dataset.append({'title':title,'url':url})

maindiv应该写成maindiv = soup.find_all('div',class_="JustInPaginationList")

for循环写成：

for items in maindiv:#resultSet
    item=items.find('a')#每个标签为a的节点元素。
    title = item.find('p').text
    url = item['href']
    print(title)
    print(url)