使用zipfile解压一个压缩了N次的zip文件

import zipfile
zipName="a.zip"
# i = 0
while zipfile.is_zipfile(zipName) :
    zipHandle=zipfile.ZipFile(zipName,"r")
    for filename in zipHandle.namelist() :
        zipName=zipHandle.extract(filename,path='dest_dir')
        #i+=1
# print i
# i文件的个数
zipHandle.close()

import zipfile
target = 'a.zip'
source = 'test.jpg'
for i in xrange(100):
    handle = zipfile.ZipFile(target, 'w')
    handle.write(source)
    source, target = target, target == 'a.zip' and 'b.zip' or 'a.zip'
handle.close()