Time for action – writing a Qt wrapper for embedding Python

As the first task, we will implement the last program using an object-oriented API. Create a new console project and add the following class to it:

#include <Python.h>
#include <QObject>
#include <QString>
class QtPython : public QObject {
  Q_OBJECT
public:
  QtPython(const char *progName, QObject *parent = 0) : QObject(parent) { 
    if(progName != 0) {
        wchar_t buf[strlen(progName+1)];
        mbstowcs(buf, progName, strlen(progName));
        Py_SetProgramName(buf);
    }
    Py_InitializeEx(0);
  }
  ~QtPython() { Py_Finalize(); }
  void run(const QString &program) {
    PyRun_SimpleString(qPrintable(program));
  }
};

Then, add a main() function as shown in the following snippet:

#include "qtpython.h"

int main(int argc, char **argv) {
  QtPython python(argv[0]);
  python.run("print('Hello from Python')");
  return 0;
}

Finally open the .pro file and tell Qt to...