[pybsddb] Change in pickle behavior since Py3rc1 breaks dbshelve.get

[Jesus Cea]

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Dmitry Dvoinikov wrote:
> It looks like pickle module behaves differently in Py3rc1 with
> respect to deserializing None:
> 
> in Py2x:
> import cPickle
> cPickle.loads(None) => throws TypeError
> 
> in Py3rc1:
> import pickle
> pickle.loads(None) => throws EOFError
> 
> I have no idea whether this change is intentional, but it does
> break dbshelve.get, because lines 233-237 no longer work:

Dmitry, this change is already done in 4.7.3pre9:

"""
        data = apply(self.db.get, args, kw)
        try:
            return cPickle.loads(data)
        except (EOFError, TypeError, cPickle.UnpicklingError):
            return data  # we may be getting the default value, or None,
                         # so it doesn't need unpickled.

"""

pybsddb 4.7.3 will be published next week, just after Python 2.6 release.

pybsddb 4.7.3 will work in Python 3.0, natively. But the API is subject
to change, specially the unicode<->byte management. The API will be
improved in future releases. Since I'm publishing a new version per
month, you'd better provide suggestion here to improve the API, instead
of coding workarounds in your applications.

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