python 15行代码完成目录文件压缩！

import os, zipfile
from os.path import join
def zipfolder(foldername, filename, includeEmptyDIr=True): 
    empty_dirs = []
    zip = zipfile.ZipFile(filename, 'w', zipfile.ZIP_DEFLATED)
    for root, dirs, files in os.walk(foldername):
        empty_dirs.extend([dir for dir in dirs if os.listdir(join(root, dir)) == []])
        for name in files:
            zip.write(join(root ,name))
        if includeEmptyDIr:
            for dir in empty_dirs:
                zif = zipfile.ZipInfo(join(root, dir) + "/")
                zip.writestr(zif, "")
        empty_dirs = []
    zip.close()