passing C++ string to Python

Question

How could I pass a string from C++ to my Python function? I would like to get the string in my C++ application and parse it in Python

Answer 1

Initialize all required variables first.

Py_Initialize();
object  main_module = import("__main__");//boost::python objects
object  dictionary = main_module.attr("__dict__");

Run a code to create a variable and set an initial value and print it inside python.

boost::python::exec("resultStr = 'oldvalue'", dictionary);
PyRun_SimpleString("print resultStr");//new value will reflect in python

read the same variable from c++.

boost::python::object resultStr = dictionary["resultStr"];//read value from python to c++
std::string &processedScript = extract<std::string>(resultStr);

Above dictionary object is like a shared map. you can set a variable from c++. Then check the new value from python.

dictionary["resultStr"] = "new value";//set the variable value
PyRun_SimpleString("print resultStr");//new value will reflect in python

Have fun coding. Thanks.