def __init__(self, mask=None):
#mask = mask or 'FolderDS/*'
self.mask = mask
ProxiesDict.__init__(self)
devs = tango.get_class_devices('FolderDS')
extra = fn.get_database().get_class_property('FolderDS',
['ExtraDevices'])
devs.extend(extra.get('ExtraDevices', []))
if mask: devs = fn.filtersmart(devs, mask)
self.hosts = fn.defaultdict(list)
for d in devs:
self[d]
