Trying to send parameters from a simple Python function to C++ -

i'm trying link python script c++ script. found , works.

foo.cpp

#include <iostream>  class foo{     public:         void bar(){             std::cout << "test!" << std::endl;         } };  extern "c" {     foo* foo_new(){ return new foo(); }     void foo_bar(foo* foo){ foo->bar(); } } 

foowrapper.py

from ctypes import cdll lib = cdll.loadlibrary('./libfoo.so')  class foo(object):     def __init__(self):         self.obj = lib.foo_new()      def bar(self):         lib.foo_bar(self.obj)   f = foo() f.bar() 

to compile use:

g++ -c -fpic foo.cpp -o foo.o g++ -shared -wl,-soname,libfoo.so -o libfoo.so foo.o 

if -soname doesn't work, use -install_name:

g++ -c -fpic foo.cpp -o foo.o g++ -shared -wl,-install_name,libfoo.so -o libfoo.so foo.o 

and execute just:
python foowrapper.py

this works, prints me 'test!' of bar() function.
the thing want send parameters python function c++ function i've tried doesnt work.

this try:

foo.cpp

#include <iostream>  class foo{     public:         void bar(int number){             printf("number is: %d", number);             std::cout << "test!" << std::endl;         } };  extern "c" {     foo* foo_new(){ return new foo(); }     void foo_bar(foo* foo){ foo->bar(int number); } } 

foowrapper.py

from ctypes import cdll lib = cdll.loadlibrary('./libfoo.so')  class foo(object):     def __init__(self):         self.obj = lib.foo_new()      def bar(self):         lib.foo_bar(self.obj)  num = 5     f = foo() f.bar(num) 

i error. trying compile c++ function:

foo.cpp: in function ‘void foo_bar(foo*)’: foo.cpp:13: error: expected primary-expression before ‘int’ 

what i'm doing wrong? in advance.

this line

    void foo_bar(foo* foo){ foo->bar(int number); } 

seems pretty wrong. int number variable decleration, want give variable parameter method. purpose, needs in method definition of foo_bar.

try:

    void foo_bar(foo* foo, int number){ foo->bar(number); } 

and in python code

def bar(self, number):     lib.foo_bar(self.obj, number)