memory error with zipfile module

[Roger Miller]

The basic problem is that the zipfile interface only reads and writes
whole files, so it may perform poorly or fail on huge files. At one
time I implemented a patch to allow reading files in chunks. However I
believe that the current interface has too many problems to solve by
incremental patching, and that a zipfile2 module is probably warranted.
(Is anyone working on this?)

In the meantime I think the best solution is often to just run an
external zip/unzip utility to do the heavy lifting.