how to check for file type in a folder

[SoulsKeeper]

Hello, I want the script to go through the entire folder and only list the files which are neither Zip or Rar files

but when I use this code, it just goes through the entire folder listing all the files, what am i doing wrong?

import zipfile, os, rarfile, unicodedata

from rarfile import RarFile
rootFolder = u"C:/Users/user/Desktop/archives/"

from zipfile import ZipFile
rootFolder = u"C:/Users/user/Desktop/archives/"

zipfiles = [os.path.join(rootFolder, f) for f in os.listdir(rootFolder)]
[print(i) for i in zipfiles if not isinstance(i, ZipFile) and not isinstance(i, RarFile)]