python - BeautifulSoup中的parent使用的一点疑问
adfa3sd5f6a 发布于 2022-10-27 20:50在看《Python网络数据采集》一书，里面有这样一段代码：
from urllib.request import urlopen
from bs4 import BeautifulSoup
html=urlopen("http://www.pythonscraping.com/pages/page3.html")
bsObj=BeautifulSoup(html,"html.parser")
print(bsObj.find("img",{"src:":"../img/gifts/img1.jpg"}).parent.previous_siblingget_text())
但是运行后出错，提示：
AttributeError: 'NoneType' object has no attribute 'parent'
爬取得URL对应的网页页面如图所示：
对应的代码如下：
Totally Normal Gifts
Here is a collection of totally normal, totally reasonable gifts that your friends are sure to love! Our collection is hand-curated by well-paid, free-range Tibetan monks.
We haven't figured out how to make online shopping carts yet, but you can send us a check to:
123 Main St.
Abuja, Nigeria We will then send your totally amazing gift, pronto! Please include an extra $5.00 for gift wrapping.
| Item Title | Description | Cost | Image |
|---|---|---|---|
| Vegetable Basket | This vegetable basket is the perfect gift for your health conscious (or overweight) friends! Now with super-colorful bell peppers! | $15.00 |
|
| Russian Nesting Dolls | Hand-painted by trained monkeys, these exquisite dolls are priceless! And by "priceless," we mean "extremely expensive"! 8 entire dolls per set! Octuple the presents! | $10,000.52 |
|
| Fish Painting | If something seems fishy about this painting, it's because it's a fish! Also hand-painted by trained monkeys! | $10,005.00 |
|
| Dead Parrot | This is an ex-parrot! Or maybe he's only resting? | $0.50 |
|
| Mystery Box | If you love suprises, this mystery box is for you! Do not place on light-colored surfaces. May cause oil staining. Keep your friends guessing! | $1.50 |
|
个人感觉书中代码逻辑上没有错误。。。但是为什么最后IDE会提示'NoneType' object呢。。。是find函数使用不对么。。。应该怎么正确写这段代码呢?
-
previous_siblingget_text中间少
.不说
对find,keyword式bsObj.find("img",src="../img/gifts/img1.jpg").parent.previous_sibling.get_text()
attr式bsObj.find("img",attrs={"src":"../img/gifts/img1.jpg"}).parent.previous_sibling.get_text()参考: http://beautifulsoup.readthedocs.io/zh_CN/latest/#find
2022-11-12 01:42 回答
jrvzx342841 -
{"src:":"../img/gifts/img1.jpg"}应该改为{"src":"../img/gifts/img1.jpg"}，它找的src属性，没有：这个符号的。还有后面应该是.previous_sibling.get_text()吧！认真点...
2022-11-12 01:42 回答
raultch -
from urllib.request import urlopen from bs4 import BeautifulSoup html=urlopen("http://www.pythonscraping.com/pages/page3.html") bsObj=BeautifulSoup(html,"html.parser") print(bsObj.find("img",{"src":"../img/gifts/img1.jpg"}).parent.previous_sibling.get_text())你的代碼... 也太多錯...
"src:"應改為"src"parent.previous_siblingget_text()應改為parent.previous_sibling.get_text()
我回答過的問題: Python-QA
2022-11-12 01:42 回答
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