[Python-Dev] Re: Zipfile needs?

Mon Jan 3 22:42:38 CET 2005

Scott David Daniels wrote:
> Brett C. wrote:
>>> Scott David Daniels wrote:
>>>>> I'm hoping to add BZIP2 compression to zipfile for 2.5. My primary
>>> motivation is that Project Gutenberg seems to be starting to use BZIP2
>>> compression for some of its zips. What other wish list things do
>>> people around here have for zipfile? I thought I'd collect input here
>>> and make a PEP.
>>>> Encryption/decryption support. Will most likely require a C extension 
>> since the algorithm relies on ints (or longs, don't remember) wrapping 
>> around when the value becomes too large.
>>> I'm trying to use byte-block streams (iterators taking iterables) as
> the basic structure of getting data in and out. I think the encryption/
> decryption can then be plugged in at the right point. If it can be set
> up properly, you can import the encryption separately and connect it to
> zipfiles with a call. Would this address what you want? I believe
> there is an issue actually building in the encryption/decryption in
> terms of redistribution.
>
Possibly. Encryption is part of the PKZIP spec so I was just thinking of 
covering that, not adding external encryption support. It really is not overly 
complex stuff, just will want to do it in C for speed probably as Guido 
suggested (but, as always, I would profile that first to see if performance is 
really that bad).
-Brett