Errors in creating Python interface for multiple C++ files in a shared library

I have two c++ files named as "animal.cpp" and "zoo.cpp". These files are compiled as a shared library "zoo.so". I want to access the functions defined in these files from Python interpreter.

However, I am getting errors. I tried to do some changes but getting different kind of errors. I hope expert of Boost-Python may guide me in solving these issues.

Note: To keep the problem simple, I have not used classes, otherwise I could easily make classes of "animal" and "zoo".

I want to access both files function from Python.

Any guidance will be highly appreciated.

Thanks,

animal.cpp

+++++++++++

/*
 * This is the C++ function we write and want to expose to Python.
 */

const std::string hello_animal() {
    return std::string("hello, animal");
}

/*
 * This is the C++ function we write and want to expose to Python.
*/
const std::string getname_animal() {
    std::string input;
    std::cout<<"Please enter your favorit animal name: ";
    std::getline(std::cin,input);
    return std::string("Your favorit animal name is: ").append(input);
}

/*
 * This is a macro Boost.Python provides to signify a Python extension module.
 */
BOOST_PYTHON_MODULE(animal) {
    // An established convention for using boost.python.
    using namespace boost::python;

    // Expose the function hello_animal().
    def("hello_animal", hello_animal);

    // Expose the function getname_animal().    
    def("getname_animal", getname_animal);
}


zoo.cpp
++++++++

/*
 * This is the C++ function we write and want to expose to Python.
 */
const std::string hello_zoo() {
    return std::string("hello, zoo");
}

/*
 * This is the C++ function we write and want to expose to Python.
*/
const std::string getname_zoo() {
    std::string input;
    std::cout<<"Please enter your favorit zoo name: ";
    std::getline(std::cin,input);
    return std::string("Your favorit zoo name is: ").append(input);
}

/*
 * This is a macro Boost.Python provides to signify a Python extension module.
 */
BOOST_PYTHON_MODULE(zoo) {
    // An established convention for using boost.python.
    using namespace boost::python;

    // Expose the function hello_zoo().
    def("hello_zoo", hello_zoo);

    // Expose the function getname_zoo().    
    def("getname_zoo", getname_zoo);
}

I have created a shared library using following command:

g++ -shared -o zoo.so -fPIC zoo.cpp animal.cpp -lboost_python -lpython2.7 -I/usr/include/python2.7

Python Interpreter Commands and output:

import zoo

zoo.getname_zoo()

Please enter your favorit zoo name: zoo

'Your favorit zoo name is: zoo'

zoo.getname_animal()

Traceback (most recent call last): File "", line 1, in AttributeError: 'module' object has no attribute 'getname_animal'

When I make following changes in animal.cpp file, I get different error.

BOOST_PYTHON_MODULE(zoo) {

instead of

BOOST_PYTHON_MODULE(animal) {

On compilation I get following error:

[root@localhost zooexample]# g++ -shared -o zoo.so -fPIC zoo.cpp animal.cpp -lboost_python -lpython2.7 -I/usr/include/python2.7 /tmp/cci4WKrP.o: In function initzoo': animal.cpp:(.text+0x15d): multiple definition ofinitzoo' /tmp/cctaGDer.o:zoo.cpp:(.text+0x15d): first defined here /tmp/cci4WKrP.o: In function init_module_zoo()': animal.cpp:(.text+0x179): multiple definition ofinit_module_zoo()' /tmp/cctaGDer.o:zoo.cpp:(.text+0x179): first defined here collect2: error: ld returned 1 exit status

+++++++++++++++++++++++++++++UPDATED++++UPDATED+++++UPDATED+++++++++++++++

Considering the suggestion given by Dan for my previous issue. Now I have created a separate file pyintf.cpp containing the following code:

BOOST_PYTHON_MODULE(pyintf) {
    def("hello_zoo", hello_zoo);
    def("getname_zoo", getname_zoo);
    def("hello_animal", hello_animal);
    def("getname_animal", getname_animal);
} 

but when I compile and create a shared library using the following command:

g++ -shared -o pyintf.so -fPIC pyintf.cpp -lboost_python -lpython2.7 -I/usr/include/python2.7

I get following error when I import the "pyintf" module in python.

import pyintf Traceback (most recent call last): File "", line 1, in ImportError: ./pyintf.so: undefined symbol: _Z9hello_zoov

Can anyone tell what I am not doing correctly?

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