def __init__(self, uri=None, modality=None):
super(Annotation, self).__init__()
self._uri = uri
self.modality = modality
# sorted dictionary
# keys: annotated segments
# values: {track: label} dictionary
self._tracks = SortedDict(key_type=(float, float),
updator=TimelineUpdator)
# dictionary
# key: label
# value: timeline
self._labels = {}
self._labelNeedsUpdate = {}
# timeline meant to store all annotated segments
self._timeline = Timeline(uri=uri)
self._timelineNeedsUpdate = True
def copy(self):
# create new empty annotation
copied = self.__class__(uri=self.uri, modality=self.modality)
# deep copy internal track dictionary
_tracks = [(key, dict(value)) for (key, value) in self._tracks.items()]
copied._tracks = SortedDict(items=_tracks,
key_type=(float, float),
updator=TimelineUpdator)
# deep copy internal label timelines
_labels = {key: timeline.copy()
for (key, timeline) in self._labels.iteritems()}
copied._labels = _labels
# deep copy need-update indicator
copied._labelNeedsUpdate = dict(self._labelNeedsUpdate)
copied._timelineNeedsUpdate = self._timelineNeedsUpdate
return copied
