This script will scan a directory tree looking for duplicate files, it uses a two stage approach of comparing file sizes and then hashs of file contents to find duplicates.

An example of running this script to just list all the duplicate files would be:
    python DuplicateFiles.py /Users/Daniel/Documents
    
An example of running this script to list and delete all the duplicate files would be:
        python DuplicateFiles.py /Users/Daniel/Documents -remove