want to count if a file exists and store a duplicate followed by a copy number on python - python-3.x

Question

I want to make a script that monitors changes in a folder and moves files to special directories. I use pip-watchdog
from watchdog.events import FileSystemEventHandler
def makeUnique(path,counter):
filename, extension = os.path.splitext(path)
# IF FILE EXISTS, ADDS NUMBER TO THE END OF THE FILENAME
file_split=filename.split('\\')
new_name="DUPLICATE_"+file_split[-1]
new_file=file_split[-1].replace(file_split[-1],new_name)
while os.path.exists(path):
path = new_file + " (" + str(counter) + ")" + extension
counter += 1
return path
def move(dest, entry, name):
"""dest = D:\Download\ChromeSetup.exe"""
file_exists = os.path.exists(dest + "\\" + name)
counter=1
if file_exists:
unique_name = makeUnique(entry,counter)
dest = dest+"\\"+unique_name
os.rename(entry, dest)
try:
print(f'[magenta][[/] [indian_red1 bold]{name}[/] [magenta]][/] -> [magenta][[/]
[orange_red1 bold]{dest}[/] [magenta]][/] to ' + f'[dark_orange]{dest}[/]')
shutil.move(entry,dest)
except:
pass
def moveByExtension(str, dest_dir, entry, name):
if name.endswith(str):
dest = dest_dir
move(dest, entry, name)
dest_dir_exe = r'D:\Download\exe_files'
class MoverHandler(FileSystemEventHandler):
def on_created(self, event):
"""when a file or directory is created"""
with os.scandir(source_dir) as entries:
for entry in entries:
name = entry.name
# app
moveByExtension('.exe', dest_dir_exe, entry, name)
My current filesystem tree:
-Download/
-- ChromeSetup.exe (rename and move to exe_files)
-Download/exe_files/
-- ChromeSetup.exe
-- DUPLICATE_ChromeSetup (1).exe
But if ChromeSetup.exe is in the download again, then the error occurs 'DUPLICATE_ChromeSetup (1).exe' already exists, although 'DUPLICATE_ChromeSetup (2).exe' is expected.
want to count if a file exists and store a duplicate followed by a copy number
I'm learning python at the moment...maybe I don't see the obvious problem
thank you in advance