It appears that there is no base class (zipfile.ZipError) for zipfile errors. Maybe there should be? At the moment, I do:

try:
   [...]
except zipfile.BadZipFile, zipfile.LargeZipFile:
   [...]

.. which is of course unreliable. There is no guarantee that a new exception class will not be added to zipfile (thus necessitating me to change my code). Better to have a single base class - zipfile.ZipError similar to TarError http://docs.python.org/library/tarfile.html#tarfile.TarError