form list of filename get the filename with highest num pythn

1import re
2list_of_files = ["file1","file100","file4","file7"]
3
4def extract_number(f):
5    s = re.findall("\d+$",f)
6    return (int(s[0]) if s else -1,f)
7
8print(max(list_of_files,key=extract_number))
9