案例1

html = '<input type="hidden" id="UserName" value="242320">'

• 假如要获取"242320"这个值，该如何实现？

pattern = r'<input type="hidden" id="UserName" value="(*?.)">'
result = re.findall(pattern, html)

• 完整代码

import re
if __name__ == '__main__':
   html = '<input type="hidden" id="UserName" value="242320">'
   pattern = r'<input type="hidden" id="UserName" value="(.*?)">'
   result = re.findall(pattern, html)
   print(result)