Improving code to autorename if filename exists

[Den0st]

Hi all, I have a part of my code that I would like to give a little upgrade.

import os
import shutil

dest = '/path/to/dest_folder'
src = '/path/to/src_folder'

for root, subdirs, files in os.walk(src):
    for file in files:
        path = os.path.join(root, file)
        shutil.move(path, dest)

This code replaces files from a folder and its subfolders to one destination-folder. The problem here is: If there are 2 files with thesame filename I get an error:

shutil.Error: Destination path '/path/to/dest_folder/filename' already exists

I'd like to change this code so it automaticly renames the file if it already exists in the destination-folder because thesame filename doesn't mean it has thesame content so I don't want to overwrite files in the destination-folder.

I've been thinking about using a timestamp but I'm not sure If and how to do it. Any tips? Ideas?

Thanks :)