[ZODB-Dev] repozo import question

[Raphael Badin]

Hi all, 

        I'm trying to use repozo for backup and I came across an import error:
after setting PYTHONPATH to /zope/Zope-2.7.0-src/lib/python/, I get the
following import error :
  File "/zope/Zope-2.7.0-src/lib/python/ZODB/__init__.py", line 18, in ?
    import cPersistence, Persistence
ImportError: No module named cPersistence

        I see that Persistence is a directory
in /zope/Zope-2.7.0-src/lib/python/ ... 

        Any hints for the missing import ?

Raphaël