TXT - Clearing without words

import re     #REGEX
import glob   #Search files
import fitz   #PyMuPDF 1.14.2

#REGEX
pattern = "[a-zA-Z]"

enList = glob.glob('./EN*')
hrList = glob.glob('./HR*')
wholeList = enList + hrList

for file in wholeList:
     with open(file, "r+", encoding="utf-8") as f:
          with open(file+"CLEAN.txt", "a+", encoding="utf-8") as n:
              for line in f:
                  if not re.match(pattern, line) == None:
                      n.write(line)