爬虫问题，大神请进，问题解决发鱼币

Ylf__

---------------------------------------------------------------------------
KeyError                                  Traceback (most recent call last)
<ipython-input-80-8370b67ec7ea> in <module>()
      3 header=soup1.select('a')
      4 for a in header:
----> 5     print(a['href'])
      6
      7

/Users/ylf__/Downloads/python/anaconda/lib/python3.5/site-packages/bs4/element.py in __getitem__(self, key)
    995         """tag[key] returns the value of the 'key' attribute for the tag,
    996         and throws an exception if it's not there."""
--> 997         return self.attrs[key]
    998
    999     def __iter__(self):

KeyError: 'href'

请问这个错误的原因是什么？
我用的是jupyter，爬取淘宝网的列表页面的网址

Ylf__

import requests
res=requests.get('https://list.tmall.com/search_shopitem.htm?user_id=1832335918&cat=2&spm=875.7931836.a2227oh.d100&oq=everite%C6%EC%BD%A2%B5%EA&suggest=0_1&from=mallfp..pc_1_suggest&ds=1&stype=search')
print(res.text)
from bs4 import BeautifulSoup
url_html=res.text
soup1=BeautifulSoup(url_html,'html.parser')
header=soup1.select('a')
for a in header:
    print(a['href'])

Ylf__

import requests
res=requests.get('https://list.tmall.com/search_shopitem.htm?user_id=1832335918&cat=2&spm=875.7931836.a2227oh.d100&oq=everite%C6%EC%BD%A2%B5%EA&suggest=0_1&from=mallfp..pc_1_suggest&ds=1&stype=search')

from bs4 import BeautifulSoup
url_html=res.text
soup1=BeautifulSoup(url_html,'html.parser')
for product in soup1.select('.product'):
    title=product.select('.productTitle')[0].text
    shop_name=product.select('.productShop-name')[0].text
    price=product.select('em')[0].text
    count=product.select('em')[1].text
    comment=product.select('span')[1].text
    #print(product.select('a'))
    print(title,shop_name,price,count,comment)

Ylf__

自己琢磨了一下解决了