Python爬虫正则表达式问题

Question

爬取网站图片

提取元素

<img class="image" alt="collection 2 look 2" src="/on/demandware.static/-/Library-Sites-alexander-wang/default/dw3b4fc073/C220_WEBLOOK_2.jpg">
<img class="image" alt="collection 2 look 5" src="/on/demandware.static/-/Library-Sites-alexander-wang/default/dwf6a588b0/C220_WEBLOOK_5.jpg">
<img class="image" alt="collection 2 look 25" src="/on/demandware.static/-/Library-Sites-alexander-wang/default/dwe1d5fbbe/C220_WEBLOOK_25.jpg">

元素中显示Current source

https://www.alexanderwang.cn/dw/image/v2/BCCC_PRD/…wang/default/dw3b4fc073/C220_WEBLOOK_2.jpg?sw=342
https://www.alexanderwang.cn/dw/image/v2/BCCC_PRD/…wang/default/dwf6a588b0/C220_WEBLOOK_5.jpg?sw=342
https://www.alexanderwang.cn/dw/image/v2/BCCC_PRD/…wang/default/dw14e4ae6c/C220_WEBLOOK_7.jpg?sw=342

 

是使用元素进行正则表达还是图片网址进行表达？

<img class="image".*?.jpg">

https://www.alexanderwang.cn/dw/image/v2/BCCC_PRD/…wang/default/\.*?/C220_WEBLOOK_\.*?.jpg?sw=342

这两个正则表达对吗？

请问问题出在哪？

谢谢

Answer 1

用正则表达式<img class="image".*src="(.*)"可以获取元素列表：

import re

s = '''<img class="image" alt="collection 2 look 2" src="/on/demandware.static/-/Library-Sites-alexander-wang/default/dw3b4fc073/C220_WEBLOOK_2.jpg">
<img class="image" alt="collection 2 look 5" src="/on/demandware.static/-/Library-Sites-alexander-wang/default/dwf6a588b0/C220_WEBLOOK_5.jpg">
<img class="image" alt="collection 2 look 25" src="/on/demandware.static/-/Library-Sites-alexander-wang/default/dwe1d5fbbe/C220_WEBLOOK_25.jpg">'''
print(re.findall('<img class="image".*src="(.*)"',s))

#输出
['/on/demandware.static/-/Library-Sites-alexander-wang/default/dw3b4fc073/C220_WEBLOOK_2.jpg', '/on/demandware.static/-/Library-Sites-alexander-wang/default/dwf6a588b0/C220_WEBLOOK_5.jpg', '/on/demandware.static/-/Library-Sites-alexander-wang/default/dwe1d5fbbe/C220_WEBLOOK_25.jpg']