orphaned-installed.py

#!/usr/bin/env python

import gentoopm
import gentoopm.exceptions


pm = gentoopm.get_package_manager()


def main():
	repo = pm.repositories['gentoo']
	for ip in pm.installed:
		try:
			gp = repo.select(ip)
		except gentoopm.exceptions.EmptyPackageSetError:
			pass
		else:
			if not gp.maintainers:
				print(gp.key)

if __name__ == '__main__':
	main()