scriptable application: Actually make the generated module available

A call to PyImport_AppendInittab() before Py_Initialize() is required
to be able to import the module. Previously, the example would only
add the instance of the mainwindow under the "__main__" module.

Task-number: PYSIDE-841
Change-Id: Ib87ddd9fa9e4dbdcf413abe1d9e6273811fc414c
Reviewed-by: Christian Tismer <tismer@stackless.com>
(cherry picked from commit b62040783613568901e76a26799e130632004a7e)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

2 files changed, 8 insertions, 10 deletions

diff --git a/examples/scriptableapplication/mainwindow.cpp b/examples/scriptableapplication/mainwindow.cpp
index 315ea227e..15c8b59f0 100644
--- a/examples/scriptableapplication/mainwindow.cpp
+++ b/examples/scriptableapplication/mainwindow.cpp
@@ -67,6 +67,7 @@
 #include <QtCore/QTextStream>
 
 static const char defaultScript[] = R"(
+import AppLib
 print("Hello, world")
 mainWindow.testFunction1()
 )";
diff --git a/examples/scriptableapplication/pythonutils.cpp b/examples/scriptableapplication/pythonutils.cpp
index eef2fada7..18ac35112 100644
--- a/examples/scriptableapplication/pythonutils.cpp
+++ b/examples/scriptableapplication/pythonutils.cpp
@@ -64,11 +64,8 @@
 
 /* from AppLib bindings */
 
-#if PY_MAJOR_VERSION >= 3
-    extern "C" PyObject *PyInit_AppLib();
-#else
-    extern "C" void initAppLib();
-#endif
+extern "C" PyObject *PyInit_AppLib();
+static const char moduleName[] = "AppLib";
 
 // This variable stores all Python types exported by this module.
 extern PyTypeObject **SbkAppLibTypes;
@@ -111,15 +108,15 @@ State init()
     if (qEnvironmentVariableIsSet(virtualEnvVar))
         initVirtualEnvironment();
 
+    if (PyImport_AppendInittab(moduleName, PyInit_AppLib) == -1) {
+        qWarning("Failed to add the module '%s' to the table of built-in modules.", moduleName);
+        return state;
+    }
+
     Py_Initialize();
     qAddPostRoutine(cleanup);
     state = PythonInitialized;
-#if PY_MAJOR_VERSION >= 3
     const bool pythonInitialized = PyInit_AppLib() != nullptr;
-#else
-    const bool pythonInitialized = true;
-    initAppLib();
-#endif
     const bool pyErrorOccurred = PyErr_Occurred() != nullptr;
     if (pythonInitialized && !pyErrorOccurred) {
         state = AppModuleLoaded;