GTK+ Forums

caracal · Posted: Tue Apr 21, 2009 5:15 pm Post subject: How to use Python with C.

note: This is just a start i will be adding more soon.

How to call a C Function from Python

test.c

Code: (C)
1 2 3 4 5 6	int add (int a, int b) { return(a+b); }

gcc -fPIC -c test.c
gcc -shared test.o -o libtest.so

echo $HOME
mkdir $HOME/example

cp libtest.so $HOME/example
export LD_LIBRARY_PATH=$HOME/example

Code: (Python)
1 2 3 4 5 6 7	#!/usr/bin/python from ctypes import * libc = CDLL('libtest.so') print(libc.sum(1, 10))

Reference
[HTML] http://docs.python.org/library/ctypes.html

How to embed Python in C

demo.c

Code: (C)

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#include <Python.h>
/* gcc -Wall -g -o demo demo.c -I/usr/include/python2.6 -L/usr/lib/python2.6/config -lpython2.6 -lnsl -ldl -lreadline -ltermcap -lieee -lpthread -lutil -lm -Xlinker -export-dynamic */

int main(int argc, char *argv[])
{
Py_Initialize();
PyRun_SimpleString("from time import time,ctime\n"
"print 'Today is',ctime(time())\n"
"print 'Wow we are actually in python right now!'\n");
Py_Finalize();
printf("Ok we are now back in C.\n");
return 0;
}

Reference
[HTML] http://docs.python.org/extending/embedding.html#very-high-level-embedding