def __init__(self, sources):
Observable.from_(sources) \
.merge_all() \
.filter(lambda s: s[0] == "tracking/status" ) \
.subscribe(self._on_tracking)
object_source = Observable.from_(sources) \
.merge_all() \
.filter(lambda s: s[0] == "data/object") \
.map(lambda s: s[1])
position_source = Observable.from_(sources) \
.merge_all() \
.filter(lambda s: s[0] == "data/position") \
.map(lambda s: s[1])
Observable.zip_array(object_source, position_source) \
.subscribe(self._on_position)
