'Read and extract information from 3 files (python)

I'am designing a code in python for extract information from a xml file with a function with two variables. The code is working with one file:

import re
def Readfiles(XFile):
    Id=''
    des=''
    with open(XFile,"r",encoding="utf-8") as h:
        for line in h:
            wline = line.rstrip("\n")
     
            if re.search("^ID\s{3}",wline):
                res=re.search(r"^ID\s{3}",wline)
                Id=res.group(1)
                  
            if re.search("^DE\s{3}",wline):
                res=re.search("^DE\s{3}",wline)
                des=res.group(1) 
        
    return(Id,des)

(Identificator,desc)=Readfiles("rte.xml", "pre.xml", "ytl.xml")

print("Nom:",Identificator)
print("Descrip:",desc)

On the other hand, I want to read more files (tree xml in the code) in a same time but it give me error.

Thank for your help.

python

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'Read and extract information from 3 files (python)

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