Bugs item #1710703, was opened at 2007-05-01 09:43 Message generated for change (Comment added) made by nnorwitz You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1710703&group_id=5470
Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: Python Library Group: Python 2.5 Status: Open Resolution: None Priority: 5 Private: No Submitted By: Mark Flacy (markaflacy) Assigned to: Nobody/Anonymous (nobody) Summary: zipfile.ZipFile behavior inconsistent. Initial Comment: In short, ZipFile() will not write the Central Directory entry unless you have added a file to it. That makes it impossible to create a valid empty zip archive. In one of my applications, I have the need to extract a partial set of information from one zip file and insert it into another. There are valid use cases where the source zip archive will not have any of the files which I am looking for. In Python 2.4, I would end up with an empty file which was considered to be a valid empty zip archive. In Python 2.5, an empty file is not considered a valid zip archive. One would reasonably expect that creating a new ZipFile(mode="r") and successfully closing it without writing any entries would result in a valid zip archive that could be re-opened later without throwing an exception. ---------------------------------------------------------------------- >Comment By: Neal Norwitz (nnorwitz) Date: 2007-05-01 23:06 Message: Logged In: YES user_id=33168 Originator: NO Mark, can you create a patch for zipfile to make it do what you want? Do the docs mention anything about this either way? Perhaps the docs also need updating? I don't know about what happened here, but I'm guessing there was some bug fix. This change could have been intentional or not. I patch will help us figure out what went wrong and how to proceed. ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=105470&aid=1710703&group_id=5470 _______________________________________________ Python-bugs-list mailing list Unsubscribe: http://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
