Question

我试图使用beautifulsoup刮取产品名称，描述，价格和图像。我有以下bs4.element.Tag类型，我想从标签中提取“src”链接。以下是我的标签：

df = <a class="itemImage" href="http://www.newegg.com/Product/Product.aspx?Item=N82E16875169194&amp;cm_re=Samsung_edge-_-75-169-194-_-Product" id="img_75-169-194" title='Samsung Galaxy S7 Edge Dual SIM Unlocked Smart Phone, Dual Edge 5.5" AMOLED Display, black Color, 32GB Storage 4GB RAM International Version - No US Warranty'>\n<img alt='Samsung Galaxy S7 Edge Dual SIM Unlocked Smart Phone, Dual Edge 5.5" AMOLED Display, black Color, 32GB Storage 4GB RAM International Version - No US Warranty' src="http://images10.newegg.com/ProductImageCompressAll200/75-169-194-04.jpg" title='Samsung Galaxy S7 Edge Dual SIM Unlocked Smart Phone, Dual Edge 5.5" AMOLED Display, black Color, 32GB Storage 4GB RAM International Version - No US Warranty'/>\n</a>

如何提取

src="http://images10.newegg.com/ProductImageCompressAll200/75-169-194-04.jpg"

来自这个标签？我试过了

df.attrs['src']

但我收到了Keyerror。

Answer 1

src位于 img 标记中：

join

哪个会给你：

from bs4 import BeautifulSoup
tag = """<a class="itemImage" href="http://www.newegg.com/Product/Product.aspx?Item=N82E16875169194&amp;cm_re=Samsung_edge-_-75-169-194-_-Product" id="img_75-169-194" title='Samsung Galaxy S7 Edge Dual SIM Unlocked Smart Phone, Dual Edge 5.5" AMOLED Display, black Color, 32GB Storage 4GB RAM International Version - No US Warranty'>\n<img alt='Samsung Galaxy S7 Edge Dual SIM Unlocked Smart Phone, Dual Edge 5.5" AMOLED Display, black Color, 32GB Storage 4GB RAM International Version - No US Warranty' src="http://images10.newegg.com/ProductImageCompressAll200/75-169-194-04.jpg" title='Samsung Galaxy S7 Edge Dual SIM Unlocked Smart Phone, Dual Edge 5.5" AMOLED Display, black Color, 32GB Storage 4GB RAM International Version - No US Warranty'/>\n</a>"""

soup = BeautifulSoup(tag,"lxml")

src = soup.img["src"]

Answer 2

在python中尝试正则表达式参考
https://docs.python.org/2/library/re.html

import re
s = """
    <a class="itemImage" href="http://www.newegg.com/Product/Product.aspx?Item=N82E16875169194&amp;cm_re=Samsung_edge-_-75-169-194-_-Product" id="img_75-169-194" title='Samsung Galaxy S7 Edge Dual SIM Unlocked Smart Phone, Dual Edge 5.5" AMOLED Display, black Color, 32GB Storage 4GB RAM International Version - No US Warranty'>\n<img alt='Samsung Galaxy S7 Edge Dual SIM Unlocked Smart Phone, Dual Edge 5.5" AMOLED Display, black Color, 32GB Storage 4GB RAM International Version - No US Warranty' src="http://images10.newegg.com/ProductImageCompressAll200/75-169-194-04.jpg" title='Samsung Galaxy S7 Edge Dual SIM Unlocked Smart Phone, Dual Edge 5.5" AMOLED Display, black Color, 32GB Storage 4GB RAM International Version - No US Warranty'/>\n</a>
    """
src_list = re.findall("src=[^\s]*", s)

输出：

src_list = ['src="http://images10.newegg.com/ProductImageCompressAll200/75-169-194-04.jpg"']

从Beautifulsoup标签中提取src

2 个答案: