ENH: Add method allowing to know if a python error occurred.

src/PythonQt.cpp

@@ -978,6 +978,7 @@ PythonQtPrivate::PythonQtPrivate()
   _noLongerWrappedCB = NULL;
   _wrappedCB = NULL;
   _currentClassInfoForClassWrapperCreation = NULL;
+  _ErrorOccured = false;
 }
 
 void PythonQtPrivate::setupSharedLibrarySuffixes()
@@ -1088,9 +1089,15 @@ bool PythonQt::handleError()
     PyErr_Clear();
     flag = true;
   }
+  PythonQt::priv()->_ErrorOccured = flag;
   return flag;
 }
 
+bool PythonQt::errorOccured()const
+{
+  return PythonQt::priv()->_ErrorOccured;
+}
+
 void PythonQt::addSysPath(const QString& path)
 {
   PythonQtObjectPtr sys;

src/PythonQt.h

@@ -446,6 +446,9 @@ class PYTHONQT_EXPORT PythonQt : public QObject {
   //! The error is currently just output to the python stderr, future version might implement better trace printing
   bool handleError();
 
+  //! return \a True if \a handleError() has been called and an error occured.
+  bool errorOccured()const;
+
   //! set a callback that is called when a QObject with parent == NULL is wrapped by pythonqt
   void setQObjectWrappedCallback(PythonQtQObjectWrappedCB* cb);
   //! set a callback that is called when a QObject with parent == NULL is no longer wrapped by pythonqt
@@ -647,6 +650,8 @@ class PYTHONQT_EXPORT PythonQtPrivate : public QObject {
   int _initFlags;
   int _PythonQtObjectPtr_metaId;
 
+  bool _ErrorOccured;
+
   friend class PythonQt;
 };