##parameters=key=None
# $Id: getCertificatesVoc.py 3339 2008-03-16 08:38:39Z henrik $
"""
Return the faculties as an vocabulary

"""
if key is None:
    res = context.portal_catalog.search({'meta_type': "Certificate"})
    return [(d.getId,d.Title,) for d in res]
res = context.portal_catalog.search({'meta_type': "Certificate", 'id': key})
if res:
    return res[0].Title
raise KeyError