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PEP 495: Updated the backward compatibility section.

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Alexander Belopolsky 2015-08-09 20:58:00 -04:00
parent d5b563e29e
commit 908470b0aa
1 changed files with 7 additions and 2 deletions
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pep-0495.txt
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@ -318,8 +318,13 @@ original datetime instance had ``first=False``.
Backward and Forward Compatibility
----------------------------------
This proposal will have no effect on the programs that do not set the
``first`` flag explicitly or use tzinfo implementations that do.
This proposal will have little effect on the programs that do not read
the ``first`` flag explicitly or use tzinfo implementations that do.
The only visible change for such programs will be that conversions to
and from POSIX timestamps will now round-trip correctly (up to
floating point rounding). Programs that implemented work-arounds to
the old incorrect behavior will need to be modified.
Pickles produced by older programs will remain fully forward
compatible. Only datetime/time instances with ``first=False`` pickled
in the new versions will become unreadable by the older Python