关于在python使用正则表达式出现了提取的为空集,请问应该如何解决?
import requests
import re
if __name__ == '__main__':
url='https://sc.chinaz.com/tupian/'
header={
'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/86.0.4240.198 Safari/537.36'
}
page_text = requests.get(url=url,headers=header).text
ex = r'''<img[^>]+src=[/'"](.*?)["]+class="lazy".*?
[]
Process finished with exit code 0