326     @classmethod

   326     @classmethod

   327     def available_cubes(cls):

   327     def available_cubes(cls):

   328         cubes = set()

   328         cubes = set()

   329         for directory in cls.cubes_search_path():

   329         for directory in cls.cubes_search_path():

   330             if not os.path.exists(directory):

   330             if not os.path.exists(directory):

   332                            % directory)

   332                            % directory)

   333                 continue

   333                 continue

   334             for cube in os.listdir(directory):

   334             for cube in os.listdir(directory):

   335                 if isdir(join(directory, cube)) and not cube == 'shared':

   335                 if isdir(join(directory, cube)) and not cube == 'shared':

   336                     cubes.add(cube)

   336                     cubes.add(cube)