Extending C program using Python unable to parse dictionary to C function using swig

I have trouble parsing dictionary from python to C program using swing module. I have written a wrapper_dict.c and struct.c program.

wrapper.c 
    #include <Python.h>
    #include "struct.h"
    PyObject *dictionary(PyObject *self, PyObject *args) {
            PyObject *dict;
            int result;
            if (!PyArg_ParseTuple(args, "O", &dict))
                     return NULL;
            result = printBook(&dict);
            return Py_BuildValue("i", result);
    }
    static PyMethodDef dictMethods[] = {
             { "printBook", dictionary, 1 },
             { NULL, NULL }
    };
    void initdict() {
            PyObject *m;
            m = Py_InitModule("dict", dictMethods);
    }
Struct.c: 
    #include<stdio.h>
    #include<string.h>
    #include "struct.h"
    int printBook (struct Books *book) {
            printf(" Book title: %s\n", book->title);
            printf(" Book author: %s\n", book->author);
            printf(" Book subject: %s\n", book->subject);
            printf(" Book book_id: %d\n", book->book_id);
            return 1;
    }

Using dynamic loading:

   xyz@M:~/Python/Cprogam/work$ gcc -fpic -c $(pkg-config --cflags --libs python2) wrapper_dict.c struct.c
    xyz@M:~/Python/Cprogam/work$ gcc -shared wrapper_dict.o struct.o -o dictmod.so

When I passed the dictionary to printBook I see the printf statements returns bunch of garbage values.

 xyz@M:~/Python/Cprogam/work$ python
    Python 2.7.6 (default, Mar 22 2014, 22:59:38)
    [GCC 4.8.2] on linux2
    Type "help", "copyright", "credits" or "license" for more information.
    >>> import dict
    >>> books= { 'title':'C progamming', 'author' : 'J k', 'subject' : 'telecomm', 'book_id': '345524'}
    >>>
   >>> dict.printBook(books)
   Book title: t?"?/0l?
   Book author: s?D
   Book subject:
   Book book_id: 4
   1

Am I missing something? Kindly let me know. Thanks in advance.