Re: [f2py] problems with parameters and common blocks

Can you please provide a code snippet? Just enough to get a feel for
your problem. It sounds something like this:

subroutine main()
real::array(20)
common /cname/ array

! Does not know there are only 4 elements
end subroutine

subroutine initialise()
real::array(20)
common /cname/ array
!Initialise first 4 elements of array
end subroutine

In this case, you should just add an array count integer to the common block.

Ben

On Mon, Aug 15, 2011 at 4:30 PM, teichmann.clemens
<teichmann.clemens-gM/[email protected]> wrote:
> Hello,
>
> I'm developing a python interface for an xml data set and an old fortran
> program (xml -> python -> fortran). Because the main computation subroutine
> needs many variables, the values are written to variables in common-blocks.
> In this common blocks are also arrays that have the size of previously given
> parameters. These parameters are just maximum values (e.g. a maximum amount
> of sth to compute). So an arrays is initiated with the size 20 even though
> there were just the first four entries set. In the subroutine, e.g.
> for-loops just iterate over those four entries using a previously given
> counter. My problem is that f2py just know the max value (which makes sense)
> and so if i handover a python list with just those four values, there is an
> system error:
> SystemError: error return without exception set
> 0-th dimension must be fixed to 22 but got 4
>
> Is there any possibilty to either change the parameters before the modul is
> implemented or change the size of the arrays? I thought of using dummy
> entries for the python lists, but this isn't my desired solution.
>
> best regards,
> Clemens Teichmann
>
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>



-- 
Benjamin D. Forbes
School of Physics
The University of Melbourne
Parkville, VIC 3010, Australia