refs #24597. Check against v2 python.

Framework/PythonInterface/core/inc/MantidPythonInterface/core/VersionCompat.h

@@ -20,6 +20,7 @@
 #define FROM_CSTRING PyUnicode_FromString
 #define CODE_OBJECT(x) x
 #else
+#define IS_PY2K
 #define INT_CHECK PyInt_Check
 #define TO_LONG PyInt_AsLong
 #define STR_CHECK PyString_Check

Framework/PythonInterface/mantid/geometry/src/Exports/ComponentInfoPythonIterator.cpp

@@ -19,10 +19,10 @@ void export_ComponentInfoPythonIterator() {
   // Export to Python
   class_<ComponentInfoPythonIterator>("ComponentInfoPythonIterator", no_init)
       .def("__iter__", objects::identity_function())
-#ifdef IS_PY3K
-      .def("__next__", &ComponentInfoPythonIterator::next)
-#else
+#ifdef IS_PY2K
       .def("next", &ComponentInfoPythonIterator::next)
+#else
+      .def("__next__", &ComponentInfoPythonIterator::next)
 #endif
       ;
 }

Framework/PythonInterface/mantid/geometry/src/Exports/DetectorInfoPythonIterator.cpp

@@ -19,10 +19,10 @@ void export_DetectorInfoPythonIterator() {
   // Export to Python
   class_<DetectorInfoPythonIterator>("DetectorInfoPythonIterator", no_init)
       .def("__iter__", objects::identity_function())
-#ifdef IS_PY3K
-      .def("__next__", &DetectorInfoPythonIterator::next)
-#else
+#ifdef IS_PY2K
       .def("next", &DetectorInfoPythonIterator::next)
+#else
+      .def("__next__", &DetectorInfoPythonIterator::next)
 #endif
       ;
 }