[issue15443] datetime module has no support for nanoseconds

[mdcb]

mdcb added the comment:

backward compatibility is implemented as 'new python can load old pickle'. isn't it what backward compatible means?

The payload changed from 10 to 12 bytes to accomodate the nanoseconds, I don't know how to handle reverse-backward compatibility or if it's really needed.

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<http://bugs.python.org/issue15443>
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