Issue 669036: zipimport doesn't support prepended junk (original) (raw)
Zip archives may be appended to/prepended by arbitrary data, but this is not supported by zipimport. zipfile.py does support this. Unfortunately there's a fair amount of offset juggling going on, so a fix is not completely straightforward. This should be fixed before 2.3a2.
zipimport also doesn't support Zip archives that have a comment attached at the end of the file, but this is less important IMO.