Downloading and unzipping a .zip file without writing to disk

Question

I have managed to get my first python script to work which downloads a list of .ZIP files from a URL and then proceeds to extract the ZIP files and writes them to disk.

Answer 1

It wasn't obvious in Vishal's answer what the file name was supposed to be in cases where there is no file on disk. I've modified his answer to work without modification for most needs.

from StringIO import StringIO
from zipfile import ZipFile
from urllib import urlopen

def unzip_string(zipped_string):
    unzipped_string = ''
    zipfile = ZipFile(StringIO(zipped_string))
    for name in zipfile.namelist():
        unzipped_string += zipfile.open(name).read()
    return unzipped_string