python-Hello.c

hello.c

/* hello.c */
#include "Python.h"

static PyObject * hello(PyObject *self)
{
    printf("Hello World!!\n");
    Py_RETURN_NONE;
}

static char hello_doc[] = "hello module\n";

static PyObject  *
hello_you (PyObject * self, PyObject * args){
    /*
    const char *name;
    static PyObject *format = NULL;
    PyObject *result;
    PyArg_ParseTuple(args, "s", &name);
    if(!PyArg_ParseTuple(args, "s", &name)){
        PyErr_SetString(MissingKeyException, "Missing parameter: name");
    }
    */
    const char *name;
    if(!PyArg_ParseTuple(args, "s", &name)){
        //PyErr_SetString(MissingKeyException, "Missing parameter: name");
        return NULL;
    }
    return Py_BuildValue("s", name);
    /*
    //sprintf(greeting, "Hello world! %s.\n", name);
    format = PyString_FromString("Helo %s");
    result = PyString_Format(format, name);
    return result;
    */
}

static PyMethodDef methods[] = {
    {"hello", (PyCFunction)hello, METH_NOARGS, "print hello world.\n"},
    {"hello_you", (PyCFunction)hello_you, METH_VARARGS, "print hello world (you).\n"},
    {NULL, NULL, 0, NULL}
};

void inithello(void)
{
    Py_InitModule3("hello", methods, hello_doc);
    Py_InitModule3("hello_you", methods, hello_doc);
}

Makefile

.PHONY all:
	gcc  -m64  -fPIC -Wall     -I/opt/local/Library/Frameworks/Python.framework/Versions/2.7/include/python2.7 -c hello.c
	gcc  -m64  -shared  -o  hello.so -lpython  hello.o

timer_mon.py

#!/usr/bin/env python2.7

import hello

import timeit

def pure_hello(name):
    return "hello world %s\n" % name

def bench1():
    name = "yuokada"
    return pure_hello(name)

def bench2():
    name = "yuokada"
    return hello.hello_you(name)

if __name__ == '__main__':
    t = timeit.Timer("bench1()", "from __main__ import bench1")
    print "pure python time :", t.timeit(number=1000000)

    t = timeit.Timer("bench2()", "from __main__ import bench2")
    print "c module time    :", t.timeit(number=1000000)

% which python2.7
/usr/bin/python2.7

% python2.7  timer_mon.py 
pure python time : 0.590466976166
c module time    : 0.521992921829

% python2.7  timer_mon.py
pure python time : 0.615018129349
c module time    : 0.534858942032

% python2.7  timer_mon.py
pure python time : 0.626820087433
c module time    : 0.525256872177