Python C Extension

You can write a module in C that you can use for Python.

#include <Python.h>
#include <stdio.h>
void Print_pyobject (Pyobject *obj)
{
py_ssize_t size = 0;
Pyobject *subobj = NULL;
Pyobject *key = NULL;
py_ssize_t pos = 0;
if (NULL = = obj)
{
Return
}
if (Py_none = = obj)
{
printf ("obj is Py_none");
}
else if (Pybool_check (obj))
{
printf ("obj is bool");
}
else if (pyint_checkexact (obj))
{
printf ("obj is int:%ld\n", Pyint_aslong (obj));
}
else if (pyfloat_checkexact (obj))
{
printf ("obj is Float:%f\n", pyfloat_asdouble (obj));
}
else if (pystring_checkexact (obj))
{
printf ("obj is string:%s\n", pystring_asstring (obj));
}
else if (pylist_checkexact (obj))
{
printf ("obj is list\n");
Size = pylist_size (obj);
int idx = 0;
for (idx = 0; idx < size; idx++)
{
Subobj = Pylist_getitem (obj, idx);
Print_pyobject (Subobj);
}
}
else if (pylist_checkexact (obj))
{
printf ("obj is dict\n");
while (Pydict_next (obj, &pos, &key, &subobj))
{
Print_pyobject (Subobj);
}
}
}
Static Pyobject *pyext_set (Pyobject *self, Pyobject *args)
{
printf ("pyext_set!\n");
Pyobject *newobject;
const char *uri;
if (! Pyarg_parsetuple (args, "so!", &uri, &pydict_type, &newobject) &&
! Pyarg_parsetuple (args, "so!", &uri, &pylist_type, &newobject))
{
Return Py_buildvalue ("I",-1);
}
printf ("uri:%s\n", URI);

Return Py_buildvalue ("I", 0);
}
Static Pymethoddef pyextmethods[] ={
{"Set", Pyext_set, Meth_varargs, "Perform set Operation"},
{null, NULL, 0, NULL}
};
void Initpyext (void)
{
Pyimport_addmodule ("Pyext");
Py_initmodule ("Pyext", pyextmethods);
}

A set method is provided in the C module.

Then write setup.py

From Distutils.core import Setup, Extension
Setup (name= ' Pyext ', version= ' 1.0 ', ext_modules=[extension (' Pyext ', sources=[' pyext.c ')])

Compiling: Python setup.py build

Installation: Python setup.py install

You can import pyext in Python.

Python C Extension