def traversal(self, visitor: Visitor):
"""
遍历
def test(key，value):
print(key, value)
return True if key == 10 else False
:param visitor: lambda函数， 类似于上面形式的
:return:
"""
if self.__size == 0:
return
assert visitor is not None, "visit不能为空，请传入一个lambda函数"
queue = Queue()
for i in range(len(self.__table)):
root = self.__table[i]
if root is None:
continue
queue.en_queue(root)
while not queue.is_empty():
node = queue.de_queue()
if visitor.visit(node.key, node.value):
return
if node.left:
queue.en_queue(node.left)
if node.right:
queue.en_queue(node.right)
def __ensure_capacity(self):
"""
扩容
:param capacity:
:return:
"""
old_capacity = len(self.__table)
if self.__size / old_capacity < 0.75:
return
# 开始扩容 扩大到原来的两倍
new_capacity = old_capacity << 1
print('---扩容了--', self.__size, old_capacity, new_capacity)
old_table = self.__table
self.__table = [None] * new_capacity
# new_table = [None] * new_capacity
queue = Queue()
for index in range(old_capacity):
root = old_table[index]
if root is None:
continue
queue.en_queue(root)
while not queue.is_empty():
node = queue.de_queue()
if node.left:
queue.en_queue(node.left)
if node.right:
queue.en_queue(node.right)
self.__move_node(node)
def level_order_tranversal(self, visitor=None) -> List[T]:
"""
层序遍历 visit为lambda函数，可以控制遍历随时停止
def visit(e):
print(e)
return True if e == 10 else False
:param visitor: lambda函数， 类似于上面形式的
:return:
"""
if self._root is None:
return
container = []
queue = Queue()
queue.en_queue(self._root)
# 如果队列不为空 进入循环
while not queue.is_empty():
node = queue.de_queue()
container.append(node.element)
if visitor is not None and visitor.visit(node.element):
# 控制遍历随时停止
return container
if node.left is not None:
queue.en_queue(node.left)
if node.right is not None:
queue.en_queue(node.right)
return container
def is_complete(self) -> bool:
"""
是否是完全二叉树
:return:
"""
if self._root is None:
return False
queue = Queue()
queue.en_queue(self._root)
is_leaf = False
while not queue.is_empty():
node = queue.de_queue()
if is_leaf and not node.is_leaf():
return False
if node.left is not None:
# 左子树不为空 入队
queue.en_queue(node.left)
elif node.right is not None:
# 能走到这里 说左子树为空，右子树不为空， 则不是完全二叉树
return False
if node.right is not None:
# 如果右子树不为空，入队
queue.en_queue(node.right)
else:
# 如果右子树为空，则后面的节点必须都是叶子节点
is_leaf = True
return True
def contains_value(self, value) -> bool:
"""
是否包含某个value
:return:
"""
queue = Queue()
queue.en_queue(self.__root)
while not queue.is_empty():
node = queue.de_queue()
if node.value == value:
return True
if node.left:
queue.en_queue(node.left)
if node.right:
queue.en_queue(node.right)
return False
def test2():
"""
测试队列
:return:
"""
queue = Queue()
queue.en_queue(3)
queue.en_queue(6)
queue.en_queue(9)
queue.en_queue(12)
# 3,6,9,12,
print(queue)
# 3
print(queue.de_queue())
# 6,9,12,
print(queue)
# 6
print(queue.front())
def level_order_tranversal(self) -> List[T]:
"""
层序遍历
:return:
"""
if self._root is None:
return
container = []
queue = Queue()
queue.en_queue(self._root)
# 如果队列不为空 进入循环
while not queue.is_empty():
node = queue.de_queue()
container.append(node.element)
if node.left is not None:
queue.en_queue(node.left)
if node.right is not None:
queue.en_queue(node.right)
return container
def contains_value(self, value) -> bool:
"""
是否包含某个value
:return:
"""
queue = Queue()
for i in range(len(self.__table)):
root = self.__table[i]
queue.en_queue(root)
while not queue.is_empty():
node = queue.de_queue()
if node is None:
continue
if node.value == value:
return True
if node.left:
queue.en_queue(node.left)
if node.right:
queue.en_queue(node.right)
return False
def height(self) -> int:
"""
计算树的高度
:return: 树的高度
"""
if self._root is None:
return 0
level_size = 1
tree_height = 0
queue = Queue()
queue.en_queue(self._root)
while not queue.is_empty():
node = queue.de_queue()
level_size -= 1
if node.left is not None:
queue.en_queue(node.left)
if node.right is not None:
queue.en_queue(node.right)
if level_size == 0:
level_size = queue.size()
tree_height += 1
return tree_height
def __str__(self): string = '' if self.__root is None: return 0 level_size = 1 # tree_height = 0 queue = Queue() queue.en_queue(self.__root) while not queue.is_empty(): node = queue.de_queue() string += node.__str__() string += ' ' level_size -= 1 if node.left is not None: queue.en_queue(node.left) if node.right is not None: queue.en_queue(node.right) if level_size == 0: level_size = queue.size() # tree_height += 1 string += '\n' return string
def __str__(self):
string = ''
queue = Queue()
queue.en_queue(self._root)
level_size = 1
while not queue.is_empty():
node = queue.de_queue()
string += str(node)
level_size -= 1
string += ','
if node.left is not None:
queue.en_queue(node.left)
if node.right is not None:
queue.en_queue(node.right)
if level_size == 0:
level_size = queue.size()
string += '\n'
return string