python - Embedding Python3 in Qt 5

Question

I would like to embed Python interpreter 3.4 into a Qt 5.2.1 application (64-bit). However I'm having build issues, I mean when I include Python header in the main.cpp it compiles fine.

#include <python.h>
#include "mainwindow.h"
#include <QApplication>

int main(int argc, char *argv[])
{
  QApplication a(argc, argv);
  MainWindow w;
  w.show();

  return a.exec();
}

but when I put it anywhere else (after Qt headers)

//
// embedpytest.cpp
//
#include <QLibrary>
#include <python.h>


EmbedPyTest::EmbedPyTest()
{
}

I get compile errors:

C:Python34includeobject.h:435: error: C2059: syntax error : ';'
C:Python34includeobject.h:435: error: C2238: unexpected token(s) preceding ';'

It's very similar problem to this one, but the solution is not working

Embedding Python in Qt 5

Anyone knows how to solve this issue ? or suggest some clean workaround so that python.h and Qt5 can live together happily ever after ?

Answer 1

Another way to avoid the conflict regarding 'slots', without the need for deactivating the keywords signals/slots/emit (which may be undesirable for large Qt projects), is to locally "park" the offending keyword while Python.h is included, and then reassign it. To achieve this, replace every occurrence of #include "Python.h" by the following block:

#pragma push_macro("slots")
#undef slots
#include "Python.h"
#pragma pop_macro("slots")

Or, more conveniently, put the above code in its own header, e.g. Python_wrapper.h, and replace all occurrences of #include "Python.h" by #include "Python_wrapper.h".