[C++-sig] What is the best way to have a C++ function return a python datetime.date object or a python datetime.datetime object?

[Holger.Joukl at LBBW.de]

Hi,

> I have a date and a datetime object in C++ and I would like to add the following methods:
>        toPyDate()
>        toPyDatetime()
>        fromPyDate()
>        fromPyDatetime()
>
> I would like to ‘bolt-on’ these methods to my C++ classes in the BOOST_PYTHON_MODULE interface layer.
>
> I am trying to avoid additional python wrappers around my boost python library.
>
> Can this be done without additional python?   What is the best/cleanest way to do this?

Without having tried it:

You should probably look at the Python datetime C-API and use it to construct DateTime objects,
then return these from your methods:

https://docs.python.org/3/c-api/datetime.html

Returning PyObjects should allow boost.python to work its magic.

The alternative being auto-magic conversion between your C++ date/time classes and Python
DateTime objects, e.g. along the lines of

https://www.boost.org/doc/libs/1_73_0/libs/python/doc/html/faq/how_can_i_automatically_convert_.html
https://stackoverflow.com/a/16109416

Best regards,
Holger






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