[Python-Dev] datetime nanosecond support (ctd?)

[Matthieu Bec]

On 12/16/14 3:28 PM, Matthieu Bec wrote:
>
> Maybe what I meant with `nothing looks quite right':
> seconds as float, microseconds as float, nanosecond as 0..999,
> nanoseconds as 0..999999999 with mandatory keyword that precludes
> microseconds - all can be made to work, none seems completely satisfying.
>
> In fact, I don't really have a use for it from python - but something
> would be needed in C for the implementation of datetime.from_timespec
> and time.from_timespec that calls the constructor

that's the datetime.time.from_timespec btw.

> PyObjectCall_CallFunction(clas,"...",...) - can this happen and remain
> hidden from the python layer?
>
> Regards,
> Matthieu
>
>
>
> On 12/16/14 12:45 PM, Alexander Belopolsky wrote:
>>
>> On Tue, Dec 16, 2014 at 12:10 PM, matthieu bec <mbec at gmto.org
>> <mailto:mbec at gmto.org>> wrote:
>>
>>     I wonder if the datetime module is really the right location, that
>>     has constructor(year, month, day, ..., second, microsecond) - with
>>     0<ms<999999, no millis. adding 0<ns<999 would seem quite ugly, in
>>     fact nothing looks quite right.
>>
>>
>> We can make nanosecond a keyword-only argument, so that
>>
>> time(1, 2, 3, nanosecond=123456789) -> 01:02:03.123456789
>>
>> and
>>
>> time(1, 2, 3, 4, nanosecond=123456789) -> error
>>
>> Users will probably be encouraged to avoid positional form when
>> specifying time to subsecond precision.  I would say  time(1, 2, 3,
>> microsecond=4) is clearer than time(1, 2, 3, 4) anyways.
>>
>> Another option is to allow float for the "second" argument:
>>
>> time(1, 2, 3.123456789) -> 01:02:03.123456789
>>
>>
>>
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>

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Matthieu Bec                GMTO Corp
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