python红黑树代码实现

可以回答这个问题，以下是一个简单的 Python 红黑树代码实现：

class Node:
    def __init__(self, key):
        self.key = key
        self.left = None
        self.right = None
        self.color = 1

class RedBlackTree:
    def __init__(self):
        self.null_node = Node(None)
        self.null_node.color = 0
        self.root = self.null_node

    def rotate_left(self, x):
        y = x.right
        x.right = y.left
        if y.left != self.null_node:
            y.left.parent = x
        y.parent = x.parent
        if x.parent == self.null_node:
            self.root = y
        elif x == x.parent.left:
            x.parent.left = y
        else:
            x.parent.right = y
        y.left = x
        x.parent = y

    def rotate_right(self, x):
        y = x.left
        x.left = y.right
        if y.right != self.null_node:
            y.right.parent = x
        y.parent = x.parent
        if x.parent == self.null_node:
            self.root = y
        elif x == x.parent.right:
            x.parent.right = y
        else:
            x.parent.left = y
        y.right = x
        x.parent = y

    def fix_insert(self, z):
        while z.parent.color == 1:
            if z.parent == z.parent.parent.right:
                y = z.parent.parent.left
                if y.color == 1:
                    y.color = 0
                    z.parent.color = 0
                    z.parent.parent.color = 1
                    z = z.parent.parent
                else:
                    if z == z.parent.left:
                        z = z.parent
                        self.rotate_right(z)
                    z.parent.color = 0
                    z.parent.parent.color = 1
                    self.rotate_left(z.parent.parent)
            else:
                y = z.parent.parent.right
                if y.color == 1:
                    y.color = 0
                    z.parent.color = 0
                    z.parent.parent.color = 1
                    z = z.parent.parent
                else:
                    if z == z.parent.right:
                        z = z.parent
                        self.rotate_left(z)
                    z.parent.color = 0
                    z.parent.parent.color = 1
                    self.rotate_right(z.parent.parent)
        self.root.color = 0

    def insert(self, key):
        z = Node(key)
        z.parent = self.null_node
        z.left = self.null_node
        z.right = self.null_node
        z.color = 1
        y = None
        x = self.root
        while x != self.null_node:
            y = x
            if z.key < x.key:
                x = x.left
            else:
                x = x.right
        z.parent = y
        if y == None:
            self.root = z
        elif z.key < y.key:
            y.left = z
        else:
            y.right = z
        if z.parent == None:
            z.color = 0
            return
        if z.parent.parent == None:
            return
        self.fix_insert(z)

    def inorder_helper(self, node):
        if node != self.null_node:
            self.inorder_helper(node.left)
            print(node.key)
            self.inorder_helper(node.right)

    def inorder(self):
        self.inorder_helper(self.root)

希望这个代码实现能够帮助你！