P.F.C. wrote:
I see what your saying.
Is there another way of declaring (at least) the docstring apart from
the actual array?(it would get messy otherwise)
I had also tried defining the variables as static but got the same
result (I thought static meant in code memory instead of the heap...?)
I am new to C so I may just be going about this all wrong...
The standard way of providing documentation strings is with PyDoc_STRVAR:
const int ge_test_args = METH_NOARGS; //The flag
for this function
PyDoc_STRVAR(ge_test_doc, "Test\nwill print \"test\""); //The
docstring
static PyMethodDef ge_methods[]={
{"test", NULL, 0, ge_test_doc}, //simply replacing the
flag and the docstring with a constant variable
{NULL,NULL}
};
-- Maranatha!
---------------------------------
PFC aka Fezzik aka GAB
On Fri, Nov 27, 2009 at 10:25 PM, MRAB <pyt...@mrabarnett.plus.com
<mailto:pyt...@mrabarnett.plus.com>> wrote:
P.F.C. wrote:
Hello, I'm new to the mailing list but have been using python
for a while.
I am now attempting to embed the interpreter into a C
application but am having an issue when building a module
exposing my application's functions to python.
I do not know if this is the right place to ask for help with
it, if it isn't then please let me know where to go.
the problem I'm having is with making a PyMethodDef array
When I make the array like this it works:
static PyMethodDef ge_methods[]={
{"test",ge_test,METH_NOARGS,"Test returns 123L"},
{NULL,NULL}
};
but as soon as I try to build the array from constant variables
like this:
const int ge_test_args = METH_NOARGS;
//The flag for this function
const char* ge_test_doc = "Test\nwill print \"test\"";
//The docstring
static PyMethodDef ge_methods[]={
{"test",ge_test, ge_test_args, ge_test_doc},
//simply replacing the flag and the docstring with a constant
variable
{NULL,NULL}
};
the compiler then gives the following errors:
./test1.c:74: error: initializer element is not constant
./test1.c:74: error: (near initialization for
‘ge_methods[0].ml_flags’)
./test1.c:74: error: initializer element is not constant
./test1.c:74: error: (near initialization for
‘ge_methods[0].ml_doc’)
I'm using the gcc compiler
This may well be because of my lack of understanding the C
language but I was hoping someone could help me out, or at least
point me in the right direction
I also posted about this at
http://talk.christiandevs.com/viewtopic.php?f=13&t=2521
<http://talk.christiandevs.com/viewtopic.php?f=13&t=2521>
<http://talk.christiandevs.com/viewtopic.php?f=13&t=2521
<http://talk.christiandevs.com/viewtopic.php?f=13&t=2521>>
I think it's because C 'const' objects aren't true constants, but are
more like read-only variables; you can initialise them in the
declaration but not assign to them otherwise. Thus what you're actually
trying to do is initialise from a variable, not a constant.
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