def levelOrder(self,a):
q = Queue()
r = a
while r is not None:
print(r.root.data)
if r.root.left is not None:
q.add(r.root.left)
if r.root.right is not None:
q.add(r.root.right)
if q.isEmpty():
print("empty")
r = None
else:
r = q.delete()
def delete(self, id): """""" path = self.on_get_path(id) self.row_deleted(path) Queue.delete(self, id)
