代码如下:
import zipfile
import stringio
class inmemoryzip(object):
    def __init__(self):
        # create the in-memory file-like object
        self.in_memory_zip = stringio.stringio()
    def append(self, filename_in_zip, file_contents):
        '''appends a file with name filename_in_zip and contents of
        file_contents to the in-memory zip.'''
        # get a handle to the in-memory zip in append mode
        zf = zipfile.zipfile(self.in_memory_zip, a, zipfile.zip_deflated, false)
        # write the file to the in-memory zip
        zf.writestr(filename_in_zip, file_contents)
        # mark the files as having been created on windows so that
        # unix permissions are not inferred as 0000
        for zfile in zf.filelist:
            zfile.create_system = 0       
        return self
    def read(self):
        '''returns a string with the contents of the in-memory zip.'''
        self.in_memory_zip.seek(0)
        return self.in_memory_zip.read()
    def writetofile(self, filename):
        '''writes the in-memory zip to a file.'''
        f = file(filename, w)
        f.write(self.read())
        f.close()
if __name__ == __main__:
    # run a test
    imz = inmemoryzip()
    imz.append(test.txt, another test).append(test2.txt, still another)
    imz.writetofile(test.zip)