...It supports pluggable "contexts" for non-Python commands, such as OS commands, MySQLdb queries and external programs. At last you can write:
for x in `os ls *.py`:
`os cp $x my_backups`
FileUniq identifies duplicate files, and optionally removes them or replaces them with hard or soft links. It is designed to work well with heavily hard-linked cp -al / rsync backups. For more information please see http://fileuniq.sourceforge.net