def __init__(self, data=None):
if data is None:
data = []
self.heap_size = len(data)
self._root = BinaryNode.from_array(data) # type: BinaryNode
self.heapify()
def test_question_1(self):
tree_1 = BinaryNode.from_array([1, 2 ,3, 4, 5, 6, 7])
assert tree_1.is_balanced()
leaf_node = next(tree_1.get_leaf_nodes())
leaf_node.rnode = BinaryNode(0)
leaf_node.rnode.rnode = BinaryNode(0)
assert not tree_1.is_balanced()
