On Friday, 3 July 2015 at 10:23:14 UTC, Laeeth Isharc wrote:
On Thursday, 2 July 2015 at 22:55:51 UTC, Laeeth Isharc wrote:
It would be v helpful to have a Datetime conversion from D.
Looks like there is a macro for converting from ymd in
datetime.h, so I guess one could just write some code
against this API in C, D, or Cython and link it in with D so
one can transfer data structures over more easily.
I know just enough about that topic to be very scared.
I should be able to call these from D without changing PyD, I
think, for D to Python. Not sure about Python to D, but maybe.
https://github.com/ariovistus/pyd/blob/master/infrastructure/python/python.d
Doh!
It's already in deimos, but you need to call
PyDateTime_IMPORT(); before calling the conversion function.
So all that is needed is the following:
module example;
import std.datetime;
import std.stdio;
import pyd.pyd;
import std.conv;
import deimos.python.datetime;
DateTime foo()
{
return DateTime(1999,1,1);
}
extern(C) void PydMain() {
ex_d_to_python((DateTime dt) =>
PyDateTime_FromDateAndTime(dt.year,dt.month,dt.day,dt.hour,dt.minute,cast(int)dt.second,0));
def!foo();
module_init();
PyDateTime_IMPORT();
}
Ideally, shouldn't PyD do this for you ? I think the code is
already there in make_object.d, but it doesn't work - maybe
because PyDateTime_IMPORT() has not been called if it needs to
be.
Thanks.
Laeeth.
Aren't there time-zone concerns? Or is this just a mapping
between D's std.datetime.DateTime and python's datetime.datetime
with tzinfo==None, i.e. a naive date?
Also, there would have to be some serious warning signs about
translating from python to D, in that the micro-seconds will be
truncated. Doesn't a lack of microseconds make it unusable for
tick data?
