Python Regular expression, small sample works but not on file

[Acernz]

When re.search() doesn't find a match, the returned object is None instead of a match object.

Thank you @Gribouillis
Yes, you are right, but that is the help, I need as if the sample size is small, I get the right result, both in python editors and regular expressions online. regex https://regex101.com/
I tried to use findall as well but same result, if I take small sample, I get result but when I give entire page source to pull out the list, I get blank.
I have attached the regular expression result. You can find the same strings in the sample file.