CPPPyWrapperExample.cpp

#include <PythonQt.h>
#include <QtGui>
#include <QApplication>

int main(int argc, char* argv[])
{
  QApplication app(argc, argv);
  PythonQt::init();
  PythonQtObjectPtr mainModule = PythonQt::self()->getMainModule();
  mainModule.evalScript(QString("import sys\n"));
  Q_ASSERT(!mainModule.isNull());
  {
    // evaluate a python file embedded in executable as resource:
    mainModule.evalFile(":eyed3tagger.py");
    // create an object, hold onto its reference
    PythonQtObjectPtr tag = mainModule.evalScript("EyeD3Tagger()\n", Py_eval_input);
    Q_ASSERT(!tag.isNull());
    tag.call("setFileName", QVariantList() << "t.mp3");
    QVariant fn = tag.call("fileName", QVariantList());
    Q_ASSERT(fn.toString() == QString("t.mp3"));
    // tag goes out of scope, reference count decremented.
  }
  {
    // Allow the python system path to recognize QFile paths in the sys.path
    PythonQt::self()->setImporter(NULL);
    // append the Qt resource root directory to the sys.path
    mainModule.evalScript("sys.path.append(':')\n");
    mainModule.evalScript("import eyed3tagger\n");
    PythonQtObjectPtr tag = mainModule.evalScript("eyed3tagger.EyeD3Tagger()\n", Py_eval_input);
    Q_ASSERT(!tag.isNull());
    tag.call("setFileName", QVariantList() << "t.mp3");
    QVariant fn = tag.call("fileName", QVariantList());
    Q_ASSERT(fn.toString() == QString("t.mp3"));
  }
  { // alternative using import and loading it as a real module from sys.path
    // import sys first
    mainModule.evalScript(QString("sys.path.append('%1')\n").arg(QDir::currentPath()));
    mainModule.evalScript("import eyed3tagger\n");
    PythonQtObjectPtr tag = mainModule.evalScript("eyed3tagger.EyeD3Tagger()\n", Py_eval_input);
    Q_ASSERT(!tag.isNull());
    tag.call("setFileName", QVariantList() << "t.mp3");
    QVariant fn = tag.call("fileName", QVariantList());
    Q_ASSERT(fn.toString() == QString("t.mp3"));
  }
  qDebug() << "finished";
  return 0;
}