def test_insertion_happens_as_expected(self):
# k = 5 and input values 1..10
k = 5
tree = BTree(k)
for i in range(1, 18):
tree.insert(i, None)
print(f'Inserted {i} into tree. root: {tree.get_root()}')
print('---')
result = tree.get_root()
self.assertTrue(result.keys == [9])
first_child_layer = result.children
self.assertTrue(len(first_child_layer) == 2)
self.assertTrue(first_child_layer[0].keys == [3, 6])
self.assertTrue(first_child_layer[1].keys == [12, 15])
for i in first_child_layer:
self.assertFalse(i.is_leaf)
# first 3 leafs
self.assertEquals([1, 2], first_child_layer[0].children[0].keys)
self.assertEquals([4, 5], first_child_layer[0].children[1].keys)
self.assertEquals([7, 8], first_child_layer[0].children[2].keys)
self.assertEquals(True, first_child_layer[0].children[0].is_leaf)
self.assertEquals(True, first_child_layer[0].children[1].is_leaf)
self.assertEquals(True, first_child_layer[0].children[2].is_leaf)
# last 3 leafs
self.assertEquals([10, 11], first_child_layer[1].children[0].keys)
self.assertEquals([13, 14], first_child_layer[1].children[1].keys)
self.assertEquals([16, 17], first_child_layer[1].children[2].keys)
self.assertEquals(True, first_child_layer[1].children[0].is_leaf)
self.assertEquals(True, first_child_layer[1].children[1].is_leaf)
self.assertEquals(True, first_child_layer[1].children[2].is_leaf)
def teste_pesquisa(self):
keys = [
20, 10, 40, 50, 30, 55, 3, 11, 4, 28, 36, 33, 52, 17, 25, 13, 54,
9, 43, 8, 48
]
chaves_procuradas = [36, 20, 100, 48, 200, 3, 300]
arr_esperado = [True, True, False, True, False, True, False]
arvore = BTree(2)
for i in keys:
arvore.insert_key(i)
existe_chave: bool = False
for i in range(len(chaves_procuradas)):
no_procura, posicao = arvore.search_tree(chaves_procuradas[i])
if no_procura is not None and posicao is not None:
existe_chave = True
else:
existe_chave = False
self.assertEqual(
existe_chave, arr_esperado[i],
f"Erro na árvore de teste: o numero {chaves_procuradas[i]} não foi encontrada"
)
def loadBtree(lista):
if not lista is None:
MyTree = BTree()
for item in lista:
MyTree.insert(item)
return MyTree
return None
def OP2BTree(lista, BTree):
if not (lista is None or BTree is None):
for item in lista:
aux = BTree.get(item)
if aux == None:
BTree.insert(item)
return str(BTree)
def mini_tree(data:list[int]) -> BTree:
'''Create a mini depth binary search tree from the data of a sorted list'''
if len(data) < 1:
return None
if len(data) == 1:
return BTree(data[0])
mid = len(data)//2
#print(mid)
node = BTree(data[mid])
node.left = mini_tree(data[:mid])
node.right = mini_tree(data[mid+1:])
return node
def test_search(self):
# k = 5 and input values 1..10
k = 195
n = 1500000
tree = BTree(k)
for i in range(0, n):
tree.insert(i, None)
if i % 100000 == 0:
print(f'{i} inserted')
print(f"root after execution. Height: {tree.height}")
for i in range(0, n):
result = tree.search(i)
self.assertTrue(i in result.keys)
def test_buggy_split(self):
# this didn't work before
tree = BTree(k=5)
root = BNode([3, 6])
root.add_child(BNode([1, 2]), BNode([4, 5]), BNode([7, 8, 9, 10]))
tree.root = root
print(f'result: {tree._split(11, root.children[2])}')
new_root = tree.get_root()
self.assertTrue([3, 6, 9] == new_root.keys)
self.assertTrue(len(new_root.children) == 4)
self.assertTrue([1, 2] == new_root.children[0].keys)
self.assertTrue([4, 5] == new_root.children[1].keys)
self.assertTrue([7, 8] == new_root.children[2].keys)
self.assertTrue([10, 11] == new_root.children[3].keys)
def OP1BTree(lista, BTree):
if not (lista is None or BTree is None):
inter = []
for item in lista:
aux = BTree.get(item)
if aux == item:
inter.append(item)
return inter
def OP3BTree(lista, BTree):
if not (lista is None or BTree is None):
for item in lista:
aux = BTree.get(item)
if aux != None:
lista.remove(item)
return str(lista)
def test_split_balances_parents_parent(self):
# k = 5 and input values 1..5
k = 5
input_node = BNode([3, 6, 9, 12])
a = BNode([1, 2])
b = BNode([4, 5])
c = BNode([7, 8])
d = BNode([10, 11])
e = BNode([13, 14, 15, 16])
a.is_leaf = True
b.is_leaf = True
b.is_leaf = True
c.is_leaf = True
d.is_leaf = True
e.is_leaf = True
input_node.add_child(a, b, c, d, e)
tree = BTree(k)
tree._split(17, e)
result = tree.get_root()
self.assertTrue(len(result.keys) == 1)
self.assertTrue(result.keys == [9])
first_child_layer = result.children
self.assertTrue(len(first_child_layer) == 2)
self.assertTrue(first_child_layer[0].keys == [3, 6])
self.assertTrue(first_child_layer[1].keys == [12, 15])
for i in first_child_layer:
self.assertFalse(i.is_leaf)
# first 3 leafs
self.assertEquals([1, 2], first_child_layer[0].children[0].keys)
self.assertEquals([4, 5], first_child_layer[0].children[1].keys)
self.assertEquals([7, 8], first_child_layer[0].children[2].keys)
self.assertEquals(True, first_child_layer[0].children[0].is_leaf)
self.assertEquals(True, first_child_layer[0].children[1].is_leaf)
self.assertEquals(True, first_child_layer[0].children[2].is_leaf)
# last 3 leafs
self.assertEquals([10, 11], first_child_layer[1].children[0].keys)
self.assertEquals([13, 14], first_child_layer[1].children[1].keys)
self.assertEquals([16, 17], first_child_layer[1].children[2].keys)
self.assertEquals(True, first_child_layer[1].children[0].is_leaf)
self.assertEquals(True, first_child_layer[1].children[1].is_leaf)
self.assertEquals(True, first_child_layer[1].children[2].is_leaf)
def teste_insercao(self):
keys = [
20, 10, 40, 50, 30, 55, 3, 11, 4, 28, 36, 33, 52, 17, 25, 13, 54,
9, 43, 8, 48
]
arr_esperado = [[20], [4, 11], [3], [8, 9, 10], [13, 17], [30, 40, 52],
[25, 28], [33, 36], [43, 48, 50], [54, 55]]
arvore = BTree(2)
for i in keys:
arvore.insert_key(i)
arr_recebido = arvore.get_tree_as_array()
for i in range(len(arr_esperado)):
self.assertEqual(
arr_recebido[i], arr_esperado[i],
f"Erro! Arvore esta diferente do esperado no node {arr_recebido[i]}, o esperado seria {arr_esperado[i]}"
)
def test_pick_second_child_as_smallest(self):
node = BNode(data=[125, 250, 375, 500])
a = BNode([25, 50, 75, 100])
b = BNode([150, 175, 200, 225])
c = BNode([275, 300, 320, 350])
d = BNode([400, 425, 450, 475])
e = BNode([525, 550, 575, 600])
node.add_child(a)
node.add_child(b)
node.add_child(c)
node.add_child(d)
node.add_child(e)
k = 5
tree = BTree(k)
result = tree._get_next_biggest_smallest_child(128, node)
self.assertEqual(b, result)
def test_split_happens_as_expected(self):
# k = 3 and input values 1..3
k = 3
expected_output = BNode([1])
a = BNode([0])
b = BNode([2])
a.is_leaf = True
b.is_leaf = True
expected_output.add_child(a)
expected_output.add_child(b)
input_node = BNode([0, 1])
tree = BTree(k)
result = tree._split(2, input_node)
self.assertTrue(result.keys, [1])
self.assertEqual(len(result.children), 2)
self.assertEqual(result.children[0].keys, [0])
self.assertEqual(result.children[1].keys, [2])
def teste_pesquisa(self):
print("TESTE DE PESQUISA")
keys = [
20, 10, 40, 50, 30, 55, 3, 11, 4, 28, 36, 33, 52, 17, 25, 13, 54,
9, 43, 8, 48
]
arvore_b_ordem_2 = BTree(2)
for i in keys:
arvore_b_ordem_2.insert_key(i)
chaves_procuradas = [36, 20, 100, 48]
for i in chaves_procuradas:
print("Key:", i)
no_procura, posicao = arvore_b_ordem_2.search_tree(i)
if (no_procura is not None and posicao is not None):
print("Encontrada key no node:", no_procura.keys,
" Na posicao:", posicao)
else:
print("Nao ha essa chave na arvore")
print()
def test_split_happens_as_expected_part_2(self):
# k = 5 and input values 1..5
k = 5
expected_output = BNode([3])
a = BNode([1, 2])
b = BNode([4, 5])
a.is_leaf = True
b.is_leaf = True
expected_output.add_child(a)
expected_output.add_child(b)
tree = BTree(k)
input_node = BNode([1, 2, 3, 4])
result = tree._split(5, input_node)
print(f'5 Values: {result}')
self.assertTrue(result.keys, [3])
self.assertEqual(len(result.children), 2)
self.assertEqual(result.children[0].keys, [1, 2])
self.assertEqual(result.children[1].keys, [4, 5])
tree.insert(6, result)
print(f'{tree.get_root()}')
def test_finds_proper_node_that_holds_our_key(self):
# k = 5 and input values 1..5
k = 3
tree = BTree(k)
for i in range(1, 32):
tree.insert(i, None)
root = tree.get_root()
self.assertTrue(
8 in tree._get_next_biggest_smallest_child(3, root).keys)
self.assertTrue(4 in tree._get_next_biggest_smallest_child(
3, root.children[0]).keys)
self.assertTrue(2 in tree._get_next_biggest_smallest_child(
3, root.children[0].children[0]).keys)
self.assertTrue(3 in tree._get_next_biggest_smallest_child(
3, root.children[0].children[0].children[0]).keys)
def teste_delete(self):
print("TESTE DE DELECAO NA ARVORE B")
keys = [
20, 10, 40, 50, 30, 55, 3, 11, 4, 28, 36, 33, 52, 17, 25, 13, 54,
9, 43, 8, 48
]
arvore_b_ordem_2 = BTree(2)
for i in keys:
arvore_b_ordem_2.insert_key(i)
chave_deletada = [36, 33, 3, 10, 25]
for i in chave_deletada:
print("Key retirada:", i)
arvore_b_ordem_2.delete_key(i)
arvore_b_ordem_2.print_tree()
print()
def teste_insercao(self):
print("TESTE DE INSERCAO NA ARVORE B")
keys = [
20, 10, 40, 50, 30, 55, 3, 11, 4, 28, 36, 33, 52, 17, 25, 13, 54,
9, 43, 8, 48
]
arvore_b_ordem_2 = BTree(2)
for i in keys:
arvore_b_ordem_2.insert_key(i)
arvore_b_ordem_2.print_tree()
print()
from tree import BTree
# k defines the key capacity for each node. Note that the actual
# key capacity is k-1
k = 10195
# the amount of nodes you wanna enter
n = 450005
tree = BTree(k)
for i in range(0, n):
tree.insert(i, None)
if i % 100000 == 0:
print(f'{i} inserted')
print(f"root after execution. Height: {tree.height}")
for i in range(0, n):
result = tree.search(i)
if i not in result.keys:
# this code will never run :-) At least it shouldn't...
raise Exception(f"{i} not contained. The tree is broken :(")
#### driver
a = TreeNode(1, None, None)
b = TreeNode(2, None, None)
c = TreeNode(5, None, None)
d = TreeNode(3, None, None)
e = TreeNode(4, None, None)
f = TreeNode(6, None, None)
g = TreeNode(7, None, None)
h = TreeNode(8, None, None)
a.left_child, a.right_child = b, c
b.left_child, b.right_child = d, e
c.left_child, c.right_child = f, g
f.left_child = h
'''
1
/ \
2 5
/ \ / \
3 4 6 7
/
8
'''
btree = BTree(a)
def test():
data = [1,2,3,4,5,6,7,8,9,10]
node = mini_tree(data)
print("tree hight:", BTree.hight(node))
BTree.print_tree(node)
# list of depths
lst = list_of_depths(node)
for i in range(len(lst)):
node = lst[i]
s = ''
while node:
s = s + '{},'.format(node.data.value)
node = node.next
#print("level {}: {}".format(i, s))
# check balance
print('-- Check balance --')
node = mini_tree([1])
print(check_balance(node)) # True
node = mini_tree([1,2,3])
print(check_balance(node)) # True
node = mini_tree([1,2,3,4,5,6])
print(check_balance(node)) # False
node = mini_tree([1,2,3,4,5,6,7])
print(check_balance(node)) # True
node = mini_tree([1,2,3,4,5,6,7,8,9])
print(check_balance(node)) # False
node = mini_tree([1,2,3,4,5,6,7,8,9,10,11,12,13,14,15])
print(check_balance(node)) # True
# validate BST
print('-- Validate BST --')
node = mini_tree([1,2,3,4,5,6])
print(validate_bst(node)) # True
node = mini_tree([10, 1,2,3,4,5,6])
print(validate_bst(node)) # False
node = BTree.generate([20,10,30,5,15,3,7,15,17])
print(validate_bst(node)) # True
# build dependency
print("-- Build dependency --")
projects = ['a','b','c','d','e','f']
dependencies = [('a', 'd'), ('f', 'b'), ('b', 'd'), ('f', 'a'), ('d', 'c')]
print(build_dependency(projects, dependencies)) # f, e, a, b, d, c
# first_common_ancestor
print('first_common_ancestor')
data = [7,5,15,2,6,13,3,4,9,1,11,8,10,0,14,12]
tree = BDTree.generate(data)
print(tree)
node1 = tree.get_node(data=13)
node2 = tree.get_node(data=9)
node = first_common_ancestor(node1, node2)
print(node.data)
# check_subtree
print('check_subtree: ', end='')
data1 = [20,10,50,7,13,36,98,4,8,12,17,28,44,80,127,2,5,9,6,60,79,1]
data2 = [4,5,2,6,1]
t1 = BTree.generate(data1)
t2 = BTree.generate(data2)
print(check_subtree(t1, t2))
t3 = BTree.generate(data2, sorted=False)
print(check_subtree(t1, t3))
# path_with_sum
print('path_with_sum')
t = BTree.generate([10,5,15,3,8,12,19,2,4,6,9,0,1,7])
print(path_with_sum(t, 20))
t2 = BTree.generate([2,1,3,1,2,1,3,1,1,3,1,2,1,3,1,1,1,1,2,1])
print(path_with_sum(t2, 5))
# tree_min_max_depth
print('tree_min_max_depth')
t = BTree.generate([10,5,15,3,8,12,19,2,4,6,9,0,1,7])
print(t)
print(tree_min_max_depth(t))
t = BTree.generate([7,4,10,2,5,8,9])
print(t)
print(tree_min_max_depth(t))
def check_subtree(t1:BTree, t2:BTree) -> bool:
if not t1 or not t2:
raise InvalidInputException()
r1 = t1.find_node(t2.value)
return compare_tree(r1, t2)