Python 汤。查找返回“；无”；只是有时候？

我正在浏览亚马逊的产品页面，并使用BeautifulSoup查找产品名称和价格。由于某些原因，“title”变量有时会返回，而有时我会得到错误，“'NoneType'对象没有属性'get_text'”

---

出现此错误

“非类型”对象没有属性“get\u text”

，因为网页的数据正在更改，没有属性具有

id=“productTitle”

，或者没有属性具有

id=“priceblock\u ourprice”

放一些这样的调试语句，你就会知道为什么会出现这个错误

soup = BeautifulSoup(page.content, 'html.parser')
print(soup)

title_soup = soup.find(id="productTitle")
print(title_soup) # <- this might print None
print(title_soup.get_text())
price_soup = soup.find(id="priceblock_ourprice")
print(price_soup) # <- this might print None
print(price_soup.get_text())

soup=BeautifulSoup（page.content，'html.parser'）
印花（汤）
title\u soup=soup.find（id=“productTitle”）
打印（title_soup）#尝试指定更多HTTP头，例如
用户代理
和
接受语言
。另外，将解析器更改为
lxml
或
html5lib

import requests
from bs4 import BeautifulSoup


headers = {
    'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0',
    'Accept-Language': 'en-US,en;q=0.5'
}

URL = 'https://www.amazon.com/Lenovo-ThinkPad-i5-10210U-i7-7500U-Wireless/dp/B08BYZD4H9/ref=sr_1_2_sspa?dchild=1&keywords=thinkpad&qid=1595377662&sr=8-2-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyMVhTU1BOODg5TlgmZW5jcnlwdGVkSWQ9QTAzMTc5MDFMNjhGMUE0VlRHT1gmZW5jcnlwdGVkQWRJZD1BMDY3MDc3MzJPQzc2QkI5UlcwSUEmd2lkZ2V0TmFtZT1zcF9hdGYmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl'

page = requests.get(URL, headers=headers)
soup = BeautifulSoup(page.content, 'lxml')  # <-- change to `lxml` or `html5lib`

title = soup.find(id="productTitle").get_text(strip=True)
price = soup.find(id="priceblock_ourprice").get_text(strip=True)
converted_price = int(price[1:6].replace(',',''))

print(converted_price)
print(title)

“有时”是什么意思？您是否重复尝试同一个url？发生这种情况时，BeautifulSoup无法找到#productTitle。标题是一个没有内容的非类型对象，看起来像是lxml完成了任务。谢谢
import requests
from bs4 import BeautifulSoup


headers = {
    'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0',
    'Accept-Language': 'en-US,en;q=0.5'
}

URL = 'https://www.amazon.com/Lenovo-ThinkPad-i5-10210U-i7-7500U-Wireless/dp/B08BYZD4H9/ref=sr_1_2_sspa?dchild=1&keywords=thinkpad&qid=1595377662&sr=8-2-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUEyMVhTU1BOODg5TlgmZW5jcnlwdGVkSWQ9QTAzMTc5MDFMNjhGMUE0VlRHT1gmZW5jcnlwdGVkQWRJZD1BMDY3MDc3MzJPQzc2QkI5UlcwSUEmd2lkZ2V0TmFtZT1zcF9hdGYmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl'

page = requests.get(URL, headers=headers)
soup = BeautifulSoup(page.content, 'lxml')  # <-- change to `lxml` or `html5lib`

title = soup.find(id="productTitle").get_text(strip=True)
price = soup.find(id="priceblock_ourprice").get_text(strip=True)
converted_price = int(price[1:6].replace(',',''))

print(converted_price)
print(title)

1049
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