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| author | Antoine Pitrou <solipsis@pitrou.net> | 2009-06-06 14:21:44 (GMT) |
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| committer | Antoine Pitrou <solipsis@pitrou.net> | 2009-06-06 14:21:44 (GMT) |
| commit | 3bbbf18a38ad2af62a090692acb6f1299baf9aba (patch) | |
| tree | 16c8325d73b7a3cfe07edabce87a299e1ad0dcb2 /Doc/whatsnew | |
| parent | c0d98aa5c00bf51a0ff7b82d8dad224a19969e43 (diff) | |
| download | cpython-3bbbf18a38ad2af62a090692acb6f1299baf9aba.zip cpython-3bbbf18a38ad2af62a090692acb6f1299baf9aba.tar.gz cpython-3bbbf18a38ad2af62a090692acb6f1299baf9aba.tar.bz2 | |
Add what's new entry for r73236.
Diffstat (limited to 'Doc/whatsnew')
| -rw-r--r-- | Doc/whatsnew/3.1.rst | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/Doc/whatsnew/3.1.rst b/Doc/whatsnew/3.1.rst index 1891038..e560bcd 100644 --- a/Doc/whatsnew/3.1.rst +++ b/Doc/whatsnew/3.1.rst @@ -384,6 +384,24 @@ New, Improved, and Deprecated Modules (Contributed by Brett Cannon.) +* :mod:`pickle` is now more compatible with Python 2.x when using a + 2.x-compatible protocol (that is, protocol 2 or lower), through translation + of some standard library module names to or from their Python 2.x + equivalents. + + This means that more (protocol 2 or lower) pickles produced by Python 3.1 + will be reusable by Python 2.x, and vice-versa. Standard set objects are + an example of this improvement. + + This has the (unfortunate but unavoidable) side effect that some + protocol 2 pickles produced by Python 3.1 won't be readable with + Python 3.0. The latest pickle protocol, protocol 3, should be used when + migrating data between Python 3.x implementations, as it doesn't attempt + to remain compatible with Python 2.x. + + (Contributed by Alexandre Vassalotti and Antoine Pitrou, :issue:`6137`.) + + Optimizations ============= |