按日期批量创建文件夹

import os,random
path=r"D:\pylx\20210622"
for i in range(20):
    ym = '202106'
    d = random.randint(10, 22)
    dd = str(d)
    rand_num = str(random.randint(0, 9999999))
    new_number = rand_num.zfill(4)
    folder = ym + dd + new_number
    file_name = path + "\\" + folder+".file"
    isExists=os.path.exists(file_name)
    if not isExists:
        os.makedirs(file_name)
        print('%s 创建文件夹成功'%file_name)
    else:
        print('%s 文件夹名称已存在'%file_name)
        continue