#!/anaconda3 python3.8
# -*- coding: utf-8 -*-
# @File: 24_BST.py
# @Author: zyping1989
# @Time: 2021/3/1 17:37
class BiTreeNode:
    def __init__(self, data):
        self.data = data
        self.lchild = None
        self.rchild = None
        self.parent = None


class BST:
    def __int__(self, li = None):
        self.root = None
        if li:
            for var in li:
                self.insert_no_rec(var)

    def insert_no_rec(self, val):
        p = self.root
        if not p:  # 空树特殊处理
            self.root = BiTreeNode(val)
            return
        while True:
            if val < p.data:
                if p.lchild:
                    p = p.lchild
                else:  # 左孩子不存在
                    p.lchild = BiTreeNode(val)
                    p.lchild.parent = p
                    return
            elif val > p.data:
                if p.rchild:
                    p = p.rchild
                else:  # 右孩子不存在
                    p.rchild = BiTreeNode(val)
                    p.rchild.parent = p
                    return
            else:
                return

tree = BST([4, 6, 7, 9, 2, 1, 3, 5, 8])

运行之后提示：TypeError:BST() takes no arguments.

请问各位，这是什么原因呢？

C:\Users\ypzh\Anaconda3\python.exe C:/Users/ypzh/Desktop/123.py
Traceback (most recent call last):
  File "C:/Users/ypzh/Desktop/123.py", line 44, in <module>
    tree = BST([4, 6, 7, 9, 2, 1, 3, 5, 8])
TypeError: BST() takes no arguments

Process finished with exit code 1