How to call C functions in python ,A tutorial of swig

Here we shall use a binary search tree c program and invoke the same from python

The c function file : download here , name it as bst.c
The swig interface file : download here , name it as bst.i
The make file would be : saved as mf


all:bst.o bst_wrap.o
    ld -shared bst.o bst_wrap.o -o _bst.so    
    python p.py   

bst_wrap.c:bst.i   
    swig -python bst.i

bst.o:bst.c
    gcc -c bst.c  -o bst.o  -I/usr/include/python2.6
   

bst_wrap.o:bst_wrap.c
    gcc -c bst_wrap.c -o bst_wrap.o -I/usr/include/python2.6
   
  
kindly note that the path to python directory and the version may be different for you .



The python p.py file :

import bst
bst.bst()

Execute the make file  as > make -f mf


But with the make file:

<A tutorial and explanation for all stuff's mentioned here will be provided asap>