Martin Landa wrote:
> > it shouldn't be possible for this:
> >
> > G_find_raster2.argtypes = [c_char_p, c_char_p]
> > G_find_raster2.restype = c_char_p
> >
> > to work but this:
> >
> > G_find_raster2.argtypes = [String, String]
> > G_find_raster2.restype = ReturnString
>
> Here I am getting
>
> Traceback (most recent call last):
> File "/home/martin/smetiste/example7.py", line 8, in <module>
> grass.G_find_raster2.argtypes = [String, String]
> NameError: name 'String' is not defined
>
> even ctypes are imported (from ctypes import *).
String and ReturnString are defined in ctypes_preamble.py and imported
into the individual wrapper modules (e.g. grass.py). They should be
visible within the script as grass.String, etc.
G_find_raster2 is (or should be) defined in grass.py as:
#
/usr/local/src/grass/7.0/dist.i686-pc-linux-gnu/include/grass/gisdefs.h: 220
if hasattr(_libs['grass_gis'], 'G_find_raster2'):
G_find_raster2 = _libs['grass_gis'].G_find_raster2
G_find_raster2.restype = ReturnString
G_find_raster2.argtypes = [String, String]
The only imports in grass.py are:
from ctypes_preamble import *
from ctypes_preamble import _variadic_function
from ctypes_loader import *
so it shouldn't be possible for it to pick up some other definition
for "String".
It's annoying that the error message doesn't indicate which class's
__init__ method is involved, or the traceback.
Some other things to check:
> from grass.lib import grass
> grass.String
<class 'ctypes.c_char_p'>
> grass.ReturnString
<class 'ctypes.c_char_p'>
> grass.G_find_raster2
<_FuncPtr object at 0x827eecc>
> grass.G_find_raster2.__class__
<class 'ctypes._FuncPtr'>
> grass.G_find_raster2.argtypes
[<class 'ctypes.c_char_p'>, <class 'ctypes.c_char_p'>]
> grass.G_find_raster2.restype
<class 'ctypes.c_char_p'>
> grass.G_find_raster2._restype_
<class 'ctypes.c_long'>
> grass.G_find_raster2._objects
{'0': <CDLL
'/usr/local/src/grass/svn/dist.i686-pc-linux-gnu/lib/libgrass_gis.so', handle
8193e88 at 824f32c>}
--
Glynn Clements <gl...@gclements.plus.com>
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