[issue15443] datetime module has no support for nanoseconds

[Alexander Belopolsky]

Alexander Belopolsky added the comment:

If alignment is not required (as is the case in pickle), we can pack year through second + nanosecond fields in 9 bytes.  For backwards compatibility we should continue accepting 10-byte pickles, but we can write in a new 9-byte format.

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue15443>
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