##parameters=key=None
# $Id: getCosCombinedVoc.py 2814 2007-11-28 12:26:51Z henrik $
"""
Return the combined courses as an vocabulary

"""
if key is None:
    l = []
    for k,v in context.portal_vocabularies.cos.items():
        l += (k,v),
    return l
for voc in (context.portal_vocabularies.cos,):
    title = voc.get(key,None)
    if title is not None:
        return title
    else:
        raise KeyError