##parameters=key=None
# $Id: get_csv_names.py 1756 2007-05-08 15:01:11Z joachim $
"""
Return the sessions as an vocabulary

"""
files = context.waeup_tool.get_csv_filenames()
if key is None:
    return [(f[:-4],f) for f in files]

return files[files.index("%s.csv" % key)]