Python script to change the change files names in a directory(Windows, May work for Mac as well but not tested)

filenamechange.py

import os

path = r'C:\Users\SudhakaraReddy.Chint\Desktop\customMetadata\\'
files = os.listdir(path)

for index, file in enumerate(files):
    print(file)
    #To remove suffix of the file name, this can be replaced based on the requirement
    filern = file.removesuffix('.md-meta.xml')
    #To remove last three characters of the file name, this can also be modified.
    filern = filern[:-3]
    #To concatenate file name and file index in loop
    filern = filern+str(index)+'.md-meta.xml'
    print(filern)
    print(file)
    #To rename the file
    os.rename(os.path.join(path, file), os.path.join(path, filern))
    
    
Example:
  Input file name: Code_Config.GDPRLastActivity_Contact.md-meta.xml
  Output file name: Code_Config.GDPRLastActivity_Cont127.md-meta.xml