Hi all again,
I've been quite busy these days and I collected all the suggestions
about the proposal. Here is a small summary:
Christian Heimes:
two numbers:
Julian Day Number (Rata Die) 32 bit signed integer
nanoseconds in a day 64 bit signed or unsigned integer
pro:
fix 2038 bug
cons:
hard conversion to Gregorian calendar
Charles Cazabon:
use tai64/tai64n/tai64na
pro:
well defined
libraries available
cons:
?
As ways to implement the idea there are these advices:
Nick Coghlan:
define common API based on datetime
maybe use TAI
fork the pure Python version of datetime, then fork the C
implementation to make PyPI version faster, then make a PEP
Guido van Rossum:
must do:
clever backward compatibility
use fewer bits as possible
stdlib is not the right place for first implementation
Since I'm not a big expert of calendars and date representation I'm
going to study the Julian Calendar and the TAI representation.
As a first read from Wikipedia the TAI solution looks very promising.
For the ways to implement the idea I also believe that It's better to
have a pure python implementation (so It can be used on python 2.x and
distributed on PyPI) and then a Python 3.x C implementation and a PEP
submission.
I'm open to any other idea/advice. If there are other people that would
like to implement this with me, just write me a mail.
Thank you.
Best Regards,
--
Vincenzo Ampolo
http://vincenzo-ampolo.net
http://goshawknest.wordpress.com
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