[GRASS-dev] [GRASS GIS] #3641: python3/ctypes: ctypes.ArgumentError: argument 2: <type 'exceptions.TypeError'>: expected LP_struct_Cell_head instance instead of LP_struct_Cell_head

[Anna Petrášová]

I can't reproduce it with the example from manual.

It's obviously a ctypes problem, that's one of the issues I haven't been
able to solve, although I thought this comes up only with Python 3, not 2.
That's why I wanted to branch 7.6 first because I knew it might take some
time to get these problem fixed in trunk.

On Thu, Sep 13, 2018 at 8:49 AM Moritz Lennert <mlennert at club.worldonline.be>
wrote:

> Hi Anna,
>
> Any idea where this comes from ? It currently keeps me from using trunk.
>
> Moritz
>
> On 11/09/18 14:59, GRASS GIS wrote:
> > #3641: python3/ctypes: ctypes.ArgumentError: argument 2: <type
> > 'exceptions.TypeError'>: expected LP_struct_Cell_head instance instead of
> > LP_struct_Cell_head
> > ----------------------------+-------------------------
> >   Reporter:  mlennert        |      Owner:  grass-dev@…
> >       Type:  defect          |     Status:  new
> >   Priority:  normal          |  Milestone:  7.8.0
> > Component:  Python          |    Version:  unspecified
> >   Keywords:  Python3 ctypes  |        CPU:  Unspecified
> >   Platform:  Unspecified     |
> > ----------------------------+-------------------------
> >   In a script using i.cutlines which in turn uses GridModule I suddenly
> get
> >   the following error using trunk:
> >
> >   {{{
> >   Traceback (most recent call last):
> >     File "/home/mlennert/.grass7/addons/scripts/i.cutlines", line 673, in
> >   <module>
> >       main()
> >     File "/home/mlennert/.grass7/addons/scripts/i.cutlines", line 278, in
> >   main
> >       grd.run()
> >     File "/data/home/mlennert/SRC/GRASS/grass_trunk/dist.x86_64-pc-linux-
> >   gnu/etc/python/grass/pygrass/modules/grid/grid.py", line 568, in run
> >       self.patch()
> >     File "/data/home/mlennert/SRC/GRASS/grass_trunk/dist.x86_64-pc-linux-
> >   gnu/etc/python/grass/pygrass/modules/grid/grid.py", line 609, in patch
> >       self.start_row, self.start_col, self.out_prefix)
> >     File "/data/home/mlennert/SRC/GRASS/grass_trunk/dist.x86_64-pc-linux-
> >   gnu/etc/python/grass/pygrass/modules/grid/patch.py", line 91, in
> >   rpatch_map
> >       rpatch_row(rast, rrasts, rbbox)
> >     File "/data/home/mlennert/SRC/GRASS/grass_trunk/dist.x86_64-pc-linux-
> >   gnu/etc/python/grass/pygrass/modules/grid/patch.py", line 41, in
> >   rpatch_row
> >       sei = get_start_end_index(bboxes)
> >     File "/data/home/mlennert/SRC/GRASS/grass_trunk/dist.x86_64-pc-linux-
> >   gnu/etc/python/grass/pygrass/modules/grid/patch.py", line 25, in
> >   get_start_end_index
> >       r_start, c_start = coor2pixel((bbox.west, bbox.north), reg)
> >     File "/data/home/mlennert/SRC/GRASS/grass_trunk/dist.x86_64-pc-linux-
> >   gnu/etc/python/grass/pygrass/utils.py", line 180, in coor2pixel
> >       return (libraster.Rast_northing_to_row(north, region.byref()),
> >   ctypes.ArgumentError: argument 2: <type 'exceptions.TypeError'>:
> expected
> >   LP_struct_Cell_head instance instead of LP_struct_Cell_head
> >   }}}
> >
> >   I do not have this error with 7.6.
> >
> >
> >
> > _______________________________________________
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> > grass-dev at lists.osgeo.org
> > https://lists.osgeo.org/mailman/listinfo/grass-dev
> >
>
>
>
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