Read the file name in txt, delete the file that is not in txt

import os
laspth='D:/toWuda/lidardata/'
data = []
i=1
for line in open("D:/toWuda/name.txt", "r"):  # 设置文件对象并读取每一行文件
    line=line.strip('\n')
    data.append(line)
for las in os.listdir(laspth):
    file_name=laspth + las
    if las not in data:
        os.remove(file_name)
        print('成功删除文件:', file_name)
    else:
        print(str(i)+'  文件存在:  '+las)
        i+=1
print('fns')