Проблема с модулем zipfile

import os
import zipfile
import time
#1. taking a file name of name of directory
 
source = input('Enter a name of file or directory: ') #тут я указал обычную папку с 3 текстовыми файлами
 
#Here is where will be our folder with backup
 
target_dir = 'D:\\Backup'
 
#2. checking for
 
if not os.path.exists(target_dir):
    os.mkdir(target_dir)
    print('The catalog was not created so we have created it')
 
#os.sep (разделение путей)
#name + direction = subdirectory
today = target_dir + os.sep + time.strftime('%Y%m%d')
 
#name of archive file
now = time.strftime('%H%M%S')
 
# commend for name of file
comment = input('Enter a commend --> ')
if len(comment) == 0:
    target = today + os.sep + now + '.zip'
else:
    target = today + os.sep + now + '_' + comment.replace(' ', '_') + '.zip'
 
#3 archiving
archiving = zipfile.ZipFile(target, mode='w')
#os.walk doing a function of searching the way where is our arciving file or dir
for root, dirs, files in os.walk(source):
    for file in files:
        archiving.write(os.path.join(root, file))#putting files in archive
 
archiving.close()

import os, zipfile
source = r'd:\test'
target = 'spam.zip' # или полный путь; каталог должен существовать
 
with  zipfile.ZipFile(target, 'w', zipfile.ZIP_DEFLATED) as arch:
    for root, dirs, files in os.walk(source):
        for tarfile in files:
            if tarfile != '':
                arch.write(os.path.join(root, tarfile))