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Date: Tue, 30 Aug 2011 22:49:04 +0100
From: MRAB <python@mrabarnett.plus.com>
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Subject: Re: Usage of PyDateTime_FromTimestamp
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On 30/08/2011 21:42, Andreas wrote:
> Hi,
>
> I'm working on a c-extension of python and want to create an instance of
> python datetime object with a unix timestamp in c.
>
> On the documentation site ( http://docs.python.org/c-api/datetime.html )
> I found the function PyDateTime_FromTimestamp() which returns a new
> reference based on an input parameter.
>
> The description is as follows: Create and return a new datetime.datetime
> object given an argument tuple suitable for passing to
> datetime.datetime.fromtimestamp().
>
> I tried out to call the function with a PyFloat_Object but the function
> always returns NULL (even if I simply put in 0).
>
> Does somebody have an example how I have to call the function or can
> give a hint what kind of parameter tuple is required to get it work?
>
The key phrase is "argument tuple". The arguments passed to a Python
call are always a tuple, not PyFloat_Object.

You can build a tuple from the PyFloat_Object using:

     Py_BuildValue("(O)", float_object)

The "(O)" says to build a tuple ("(...)") containing a single object
("O").