判断文件是否存在，下载pdf

from method import *

file_url = "http://disc.static.szse.cn/download"    # 下载地址

save_dir = r"D:\Users\Desktop\data\notice\test\\"

path1 = r'D:\Users\Desktop\data\notice\公告文件下载测试.txt'
all = File_List(path1)

for i in range(len(all)):
    url_f = file_url + all[i]
    date_t = all[i].split('/')[-2]
    filename = all[i].split('/')[-1]
    print(filename)
    save_dir_t = os.path.join(save_dir, date_t)
    if not os.path.isdir(save_dir_t):
        os.makedirs(save_dir_t)
    save_path = os.path.join(save_dir_t, filename)

    if not os.path.exists(save_path):
        urllib.request.urlretrieve(url_f, save_path)