def __init__(self, source=None):
"""
Creates a new Event instance, copying from the source if present
@param source: An event used to initialize the new event
@type source: Event
"""
PrimaryObject.__init__(self, source)
SourceBase.__init__(self, source)
NoteBase.__init__(self, source)
MediaBase.__init__(self, source)
AttributeBase.__init__(self)
DateBase.__init__(self, source)
PlaceBase.__init__(self, source)
if source:
self.description = source.description
self.type = source.type
else:
self.description = ""
self.type = EventType()
