使用 Python 的 Beautiful Soup 提取图像

jpe*_*796 3 html python beautifulsoup python-3.x

我使用以下代码从亚马逊列表中提取我需要的 HTML:

import requests
from bs4 import BeautifulSoup

r=requests.get("http://www.amazon.com/dp/B0007RXSB4")

soup=BeautifulSoup(r.content)

soup.find_all("div", {"id":"imgTagWrapperId"})
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这给了我这个:

[<div class="imgTagWrapper" id="imgTagWrapperId">\n<img alt="Johnston         
&amp; Murphy Men's Greenwich Oxford,Black,6 D" class="a-dynamic-image 
a-stretch-vertical" data-a-dynamic-image='{"http://ecx.images-
amazon.com/images/I/81zwayZox-S._UY695_.jpg":
[695,695],"http://ecx.images-amazon.com/images/I/81zwayZox-
S._UY535_.jpg":[535,535],"http://ecx.images-
amazon.com/images/I/81zwayZox-S._UY500_.jpg":
[500,500],"http://ecx.images-amazon.com/images/I/81zwayZox-
S._UY575_.jpg":[575,575],"http://ecx.images-
amazon.com/images/I/81zwayZox-S._UY395_.jpg":
[395,395],"http://ecx.images-amazon.com/images/I/81zwayZox-
S._UY585_.jpg":[585,585]}' data-old-hires="http://ecx.images-
amazon.com/images/I/81zwayZox-S._UL1500_.jpg" id="landingImage" 
onload="this.onload='';setCSMReq('af');if(typeof addlongPoleTag === 
'function'){ addlongPoleTag('af','desktop-image-atf-
marker');};setCSMReq('cf')" src="http://ecx.images-
amazon.com/images/I/41KixMIlPNL._SY395_QL70_.jpg" style="max-
width:695px;max-height:695px;">\n</img></div>]
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我只需要知道如何提取

http://ecx.images-amazon.com/images/I/81zwayZox-S._UY695_.jpg

从上面的代码。

ale*_*cxe 6

首先,您需要img在已经找到的 div 中找到标签。一种方法是链接find()调用:

img = soup.find("div", {"id": "imgTagWrapperId"}).find("img")
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或者,使用CSS 选择器

img = soup.select_one("div#imgTagWrapperId > img")
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然后,如果您需要src属性中的图像 URL :

img["src"]
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如果您需要data-a-dynamic-image属性内的图像 URL ,我建议您将值加载到带有json模块的 python 字典中并获取keys()

import json

img = soup.find("div", {"id": "imgTagWrapperId"}).find("img")
data = json.loads(img["data-a-dynamic-image"])
print(list(data.keys()))
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印刷:

[
    u'http://ecx.images-amazon.com/images/I/81zwayZox-S._UY695_.jpg',
    u'http://ecx.images-amazon.com/images/I/81zwayZox-S._UY575_.jpg',     
    u'http://ecx.images-amazon.com/images/I/81zwayZox-S._UY500_.jpg',     
    u'http://ecx.images-amazon.com/images/I/81zwayZox-S._UY395_.jpg',     
    u'http://ecx.images-amazon.com/images/I/81zwayZox-S._UY535_.jpg',     
    u'http://ecx.images-amazon.com/images/I/81zwayZox-S._UY585_.jpg'
]
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