[ZODB-Dev] RFC: Attempts at Python2-compatible pickles cause unpicklable objects

[Tres Seaver]

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I posted an issue, including a gist showing the problem:

 https://github.com/zopefoundation/ZODB/issues/10

The 'issue_10' branch adds a test (failing without the patch) and a patch
for this issue:

 https://github.com/zopefoundation/ZODB/pull/11

I think we arrived at consensus that trying to emit backward-compatible
pickles (bytes pickled using the string opcodes, as in Python2) was the
wrong approach, and that when we get around to tackling the problem, we
would do so by having Python2 emit forward-compatible pickles instead
(using a custom 'binary' type for things which should be bytes in Py3k,
and using the protocol 3 opcodes to pickle them).

If I am correct about this consensus, then in addition to merging PR #11
for ZODB, we should also drop the 'bytes_as_strings' changes to 'zodbpickle'.

Thoughts?


Tres.
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Tres Seaver          +1 540-429-0999          tseaver at palladion.com
Palladion Software   "Excellence by Design"    http://palladion.com
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