diff --git a/playground/cython/cython_cache/src/cy_ctest.c b/playground/cython/cython_cache/src/cy_ctest.c
index 3a8930b6..071c3447 100644
--- a/playground/cython/cython_cache/src/cy_ctest.c
+++ b/playground/cython/cython_cache/src/cy_ctest.c
@@ -951,6 +951,16 @@ static void __pyx_insert_code_object(int code_line, PyCodeObject* code_object);
 static void __Pyx_AddTraceback(const char *funcname, int c_line,
                                int py_line, const char *filename);
 
+/* Print.proto */
+static int __Pyx_Print(PyObject*, PyObject *, int);
+#if CYTHON_COMPILING_IN_PYPY || PY_MAJOR_VERSION >= 3
+static PyObject* __pyx_print = 0;
+static PyObject* __pyx_print_kwargs = 0;
+#endif
+
+/* PrintOne.proto */
+static int __Pyx_PrintOne(PyObject* stream, PyObject *o);
+
 /* CIntToPy.proto */
 static CYTHON_INLINE PyObject* __Pyx_PyInt_From_long(long value);
 
@@ -980,35 +990,46 @@ static int __Pyx_check_binary_version(void);
 static int __Pyx_InitStrings(__Pyx_StringTabEntry *t);
 
 
+/* Module declarations from 'cpython.version' */
+
 /* Module declarations from 'cy_ctest' */
 #define __Pyx_MODULE_NAME "cy_ctest"
 extern int __pyx_module_is_main_cy_ctest;
 int __pyx_module_is_main_cy_ctest = 0;
 
 /* Implementation of 'cy_ctest' */
+static const char __pyx_k_end[] = "end";
+static const char __pyx_k_file[] = "file";
 static const char __pyx_k_main[] = "__main__";
 static const char __pyx_k_name[] = "__name__";
 static const char __pyx_k_test[] = "__test__";
+static const char __pyx_k_print[] = "print";
 static const char __pyx_k_pyhello[] = "pyhello";
 static const char __pyx_k_cy_ctest[] = "cy_ctest";
 static const char __pyx_k_cline_in_traceback[] = "cline_in_traceback";
+static const char __pyx_k_Compiled_with_python_version_s[] = "Compiled with python version %s";
 static const char __pyx_k_home_romain_dev_waf_wrapper_waf[] = "/home/romain/dev/waf-wrapper/waf/playground/cython/src/cy_ctest.pyx";
+static PyObject *__pyx_kp_s_Compiled_with_python_version_s;
 static PyObject *__pyx_n_s_cline_in_traceback;
 static PyObject *__pyx_n_s_cy_ctest;
+static PyObject *__pyx_n_s_end;
+static PyObject *__pyx_n_s_file;
 static PyObject *__pyx_kp_s_home_romain_dev_waf_wrapper_waf;
 static PyObject *__pyx_n_s_main;
 static PyObject *__pyx_n_s_name;
+static PyObject *__pyx_n_s_print;
 static PyObject *__pyx_n_s_pyhello;
 static PyObject *__pyx_n_s_test;
 static PyObject *__pyx_pf_8cy_ctest_pyhello(CYTHON_UNUSED PyObject *__pyx_self); /* proto */
 static PyObject *__pyx_codeobj_;
 /* Late includes */
 
-/* "cy_ctest.pyx":3
- * cimport cy_ctest
+/* "cy_ctest.pyx":5
+ * #cimport commented_import
  * 
  * def pyhello():             # <<<<<<<<<<<<<<
  *     cy_ctest.hello()
+ *     print("Compiled with python version %s" % PY_VERSION)
  */
 
 /* Python wrapper */
@@ -1028,24 +1049,48 @@ static PyObject *__pyx_pw_8cy_ctest_1pyhello(PyObject *__pyx_self, CYTHON_UNUSED
 static PyObject *__pyx_pf_8cy_ctest_pyhello(CYTHON_UNUSED PyObject *__pyx_self) {
   PyObject *__pyx_r = NULL;
   __Pyx_RefNannyDeclarations
+  PyObject *__pyx_t_1 = NULL;
+  PyObject *__pyx_t_2 = NULL;
   __Pyx_RefNannySetupContext("pyhello", 0);
 
-  /* "cy_ctest.pyx":4
+  /* "cy_ctest.pyx":6
  * 
  * def pyhello():
  *     cy_ctest.hello()             # <<<<<<<<<<<<<<
+ *     print("Compiled with python version %s" % PY_VERSION)
  */
   hello();
 
-  /* "cy_ctest.pyx":3
- * cimport cy_ctest
+  /* "cy_ctest.pyx":7
+ * def pyhello():
+ *     cy_ctest.hello()
+ *     print("Compiled with python version %s" % PY_VERSION)             # <<<<<<<<<<<<<<
+ */
+  __pyx_t_1 = __Pyx_PyObject_FromString(PY_VERSION); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 7, __pyx_L1_error)
+  __Pyx_GOTREF(__pyx_t_1);
+  __pyx_t_2 = __Pyx_PyString_Format(__pyx_kp_s_Compiled_with_python_version_s, __pyx_t_1); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 7, __pyx_L1_error)
+  __Pyx_GOTREF(__pyx_t_2);
+  __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
+  if (__Pyx_PrintOne(0, __pyx_t_2) < 0) __PYX_ERR(0, 7, __pyx_L1_error)
+  __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
+
+  /* "cy_ctest.pyx":5
+ * #cimport commented_import
  * 
  * def pyhello():             # <<<<<<<<<<<<<<
  *     cy_ctest.hello()
+ *     print("Compiled with python version %s" % PY_VERSION)
  */
 
   /* function exit code */
   __pyx_r = Py_None; __Pyx_INCREF(Py_None);
+  goto __pyx_L0;
+  __pyx_L1_error:;
+  __Pyx_XDECREF(__pyx_t_1);
+  __Pyx_XDECREF(__pyx_t_2);
+  __Pyx_AddTraceback("cy_ctest.pyhello", __pyx_clineno, __pyx_lineno, __pyx_filename);
+  __pyx_r = NULL;
+  __pyx_L0:;
   __Pyx_XGIVEREF(__pyx_r);
   __Pyx_RefNannyFinishContext();
   return __pyx_r;
@@ -1097,11 +1142,15 @@ static struct PyModuleDef __pyx_moduledef = {
 #endif
 
 static __Pyx_StringTabEntry __pyx_string_tab[] = {
+  {&__pyx_kp_s_Compiled_with_python_version_s, __pyx_k_Compiled_with_python_version_s, sizeof(__pyx_k_Compiled_with_python_version_s), 0, 0, 1, 0},
   {&__pyx_n_s_cline_in_traceback, __pyx_k_cline_in_traceback, sizeof(__pyx_k_cline_in_traceback), 0, 0, 1, 1},
   {&__pyx_n_s_cy_ctest, __pyx_k_cy_ctest, sizeof(__pyx_k_cy_ctest), 0, 0, 1, 1},
+  {&__pyx_n_s_end, __pyx_k_end, sizeof(__pyx_k_end), 0, 0, 1, 1},
+  {&__pyx_n_s_file, __pyx_k_file, sizeof(__pyx_k_file), 0, 0, 1, 1},
   {&__pyx_kp_s_home_romain_dev_waf_wrapper_waf, __pyx_k_home_romain_dev_waf_wrapper_waf, sizeof(__pyx_k_home_romain_dev_waf_wrapper_waf), 0, 0, 1, 0},
   {&__pyx_n_s_main, __pyx_k_main, sizeof(__pyx_k_main), 0, 0, 1, 1},
   {&__pyx_n_s_name, __pyx_k_name, sizeof(__pyx_k_name), 0, 0, 1, 1},
+  {&__pyx_n_s_print, __pyx_k_print, sizeof(__pyx_k_print), 0, 0, 1, 1},
   {&__pyx_n_s_pyhello, __pyx_k_pyhello, sizeof(__pyx_k_pyhello), 0, 0, 1, 1},
   {&__pyx_n_s_test, __pyx_k_test, sizeof(__pyx_k_test), 0, 0, 1, 1},
   {0, 0, 0, 0, 0, 0, 0}
@@ -1114,13 +1163,14 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedConstants(void) {
   __Pyx_RefNannyDeclarations
   __Pyx_RefNannySetupContext("__Pyx_InitCachedConstants", 0);
 
-  /* "cy_ctest.pyx":3
- * cimport cy_ctest
+  /* "cy_ctest.pyx":5
+ * #cimport commented_import
  * 
  * def pyhello():             # <<<<<<<<<<<<<<
  *     cy_ctest.hello()
+ *     print("Compiled with python version %s" % PY_VERSION)
  */
-  __pyx_codeobj_ = (PyObject*)__Pyx_PyCode_New(0, 0, 0, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_home_romain_dev_waf_wrapper_waf, __pyx_n_s_pyhello, 3, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj_)) __PYX_ERR(0, 3, __pyx_L1_error)
+  __pyx_codeobj_ = (PyObject*)__Pyx_PyCode_New(0, 0, 0, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_home_romain_dev_waf_wrapper_waf, __pyx_n_s_pyhello, 5, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj_)) __PYX_ERR(0, 5, __pyx_L1_error)
   __Pyx_RefNannyFinishContext();
   return 0;
   __pyx_L1_error:;
@@ -1395,21 +1445,22 @@ if (!__Pyx_RefNanny) {
   if (__Pyx_patch_abc() < 0) __PYX_ERR(0, 1, __pyx_L1_error)
   #endif
 
-  /* "cy_ctest.pyx":3
- * cimport cy_ctest
+  /* "cy_ctest.pyx":5
+ * #cimport commented_import
  * 
  * def pyhello():             # <<<<<<<<<<<<<<
  *     cy_ctest.hello()
+ *     print("Compiled with python version %s" % PY_VERSION)
  */
-  __pyx_t_1 = PyCFunction_NewEx(&__pyx_mdef_8cy_ctest_1pyhello, NULL, __pyx_n_s_cy_ctest); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 3, __pyx_L1_error)
+  __pyx_t_1 = PyCFunction_NewEx(&__pyx_mdef_8cy_ctest_1pyhello, NULL, __pyx_n_s_cy_ctest); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 5, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
-  if (PyDict_SetItem(__pyx_d, __pyx_n_s_pyhello, __pyx_t_1) < 0) __PYX_ERR(0, 3, __pyx_L1_error)
+  if (PyDict_SetItem(__pyx_d, __pyx_n_s_pyhello, __pyx_t_1) < 0) __PYX_ERR(0, 5, __pyx_L1_error)
   __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
 
   /* "cy_ctest.pyx":1
- * cimport cy_ctest             # <<<<<<<<<<<<<<
- * 
- * def pyhello():
+ * from cpython.version cimport PY_VERSION             # <<<<<<<<<<<<<<
+ * cimport cy_ctest
+ * #cimport commented_import
  */
   __pyx_t_1 = __Pyx_PyDict_NewPresized(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 1, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
@@ -1703,6 +1754,149 @@ bad:
     Py_XDECREF(py_frame);
 }
 
+/* Print */
+#if !CYTHON_COMPILING_IN_PYPY && PY_MAJOR_VERSION < 3
+static PyObject *__Pyx_GetStdout(void) {
+    PyObject *f = PySys_GetObject((char *)"stdout");
+    if (!f) {
+        PyErr_SetString(PyExc_RuntimeError, "lost sys.stdout");
+    }
+    return f;
+}
+static int __Pyx_Print(PyObject* f, PyObject *arg_tuple, int newline) {
+    int i;
+    if (!f) {
+        if (!(f = __Pyx_GetStdout()))
+            return -1;
+    }
+    Py_INCREF(f);
+    for (i=0; i < PyTuple_GET_SIZE(arg_tuple); i++) {
+        PyObject* v;
+        if (PyFile_SoftSpace(f, 1)) {
+            if (PyFile_WriteString(" ", f) < 0)
+                goto error;
+        }
+        v = PyTuple_GET_ITEM(arg_tuple, i);
+        if (PyFile_WriteObject(v, f, Py_PRINT_RAW) < 0)
+            goto error;
+        if (PyString_Check(v)) {
+            char *s = PyString_AsString(v);
+            Py_ssize_t len = PyString_Size(v);
+            if (len > 0) {
+                switch (s[len-1]) {
+                    case ' ': break;
+                    case '\f': case '\r': case '\n': case '\t': case '\v':
+                        PyFile_SoftSpace(f, 0);
+                        break;
+                    default:  break;
+                }
+            }
+        }
+    }
+    if (newline) {
+        if (PyFile_WriteString("\n", f) < 0)
+            goto error;
+        PyFile_SoftSpace(f, 0);
+    }
+    Py_DECREF(f);
+    return 0;
+error:
+    Py_DECREF(f);
+    return -1;
+}
+#else
+static int __Pyx_Print(PyObject* stream, PyObject *arg_tuple, int newline) {
+    PyObject* kwargs = 0;
+    PyObject* result = 0;
+    PyObject* end_string;
+    if (unlikely(!__pyx_print)) {
+        __pyx_print = PyObject_GetAttr(__pyx_b, __pyx_n_s_print);
+        if (!__pyx_print)
+            return -1;
+    }
+    if (stream) {
+        kwargs = PyDict_New();
+        if (unlikely(!kwargs))
+            return -1;
+        if (unlikely(PyDict_SetItem(kwargs, __pyx_n_s_file, stream) < 0))
+            goto bad;
+        if (!newline) {
+            end_string = PyUnicode_FromStringAndSize(" ", 1);
+            if (unlikely(!end_string))
+                goto bad;
+            if (PyDict_SetItem(kwargs, __pyx_n_s_end, end_string) < 0) {
+                Py_DECREF(end_string);
+                goto bad;
+            }
+            Py_DECREF(end_string);
+        }
+    } else if (!newline) {
+        if (unlikely(!__pyx_print_kwargs)) {
+            __pyx_print_kwargs = PyDict_New();
+            if (unlikely(!__pyx_print_kwargs))
+                return -1;
+            end_string = PyUnicode_FromStringAndSize(" ", 1);
+            if (unlikely(!end_string))
+                return -1;
+            if (PyDict_SetItem(__pyx_print_kwargs, __pyx_n_s_end, end_string) < 0) {
+                Py_DECREF(end_string);
+                return -1;
+            }
+            Py_DECREF(end_string);
+        }
+        kwargs = __pyx_print_kwargs;
+    }
+    result = PyObject_Call(__pyx_print, arg_tuple, kwargs);
+    if (unlikely(kwargs) && (kwargs != __pyx_print_kwargs))
+        Py_DECREF(kwargs);
+    if (!result)
+        return -1;
+    Py_DECREF(result);
+    return 0;
+bad:
+    if (kwargs != __pyx_print_kwargs)
+        Py_XDECREF(kwargs);
+    return -1;
+}
+#endif
+
+/* PrintOne */
+#if !CYTHON_COMPILING_IN_PYPY && PY_MAJOR_VERSION < 3
+static int __Pyx_PrintOne(PyObject* f, PyObject *o) {
+    if (!f) {
+        if (!(f = __Pyx_GetStdout()))
+            return -1;
+    }
+    Py_INCREF(f);
+    if (PyFile_SoftSpace(f, 0)) {
+        if (PyFile_WriteString(" ", f) < 0)
+            goto error;
+    }
+    if (PyFile_WriteObject(o, f, Py_PRINT_RAW) < 0)
+        goto error;
+    if (PyFile_WriteString("\n", f) < 0)
+        goto error;
+    Py_DECREF(f);
+    return 0;
+error:
+    Py_DECREF(f);
+    return -1;
+    /* the line below is just to avoid C compiler
+     * warnings about unused functions */
+    return __Pyx_Print(f, NULL, 0);
+}
+#else
+static int __Pyx_PrintOne(PyObject* stream, PyObject *o) {
+    int res;
+    PyObject* arg_tuple = PyTuple_Pack(1, o);
+    if (unlikely(!arg_tuple))
+        return -1;
+    res = __Pyx_Print(stream, arg_tuple, 1);
+    Py_DECREF(arg_tuple);
+    return res;
+}
+#endif
+
 /* CIntToPy */
 static CYTHON_INLINE PyObject* __Pyx_PyInt_From_long(long value) {
     const long neg_one = (long) ((long) 0 - (long) 1), const_zero = (long) 0;
diff --git a/playground/cython/cython_cache/src/cy_cxxtest.cc b/playground/cython/cython_cache/src/cy_cxxtest.cc
index 0d56fbdd..3259cd81 100644
--- a/playground/cython/cython_cache/src/cy_cxxtest.cc
+++ b/playground/cython/cython_cache/src/cy_cxxtest.cc
@@ -1012,6 +1012,8 @@ static int __Pyx_ExportFunction(const char *name, void (*f)(void), const char *s
 static int __Pyx_InitStrings(__Pyx_StringTabEntry *t);
 
 
+/* Module declarations from 'cpython.version' */
+
 /* Module declarations from 'cy_cxxtest' */
 __PYX_EXTERN_C void cy_hello(void); /*proto*/
 #define __Pyx_MODULE_NAME "cy_cxxtest"
@@ -1029,7 +1031,9 @@ static const char __pyx_k_pyhello[] = "pyhello";
 static const char __pyx_k_cy_cxxtest[] = "cy_cxxtest";
 static const char __pyx_k_cline_in_traceback[] = "cline_in_traceback";
 static const char __pyx_k_hello_cython_world[] = "hello cython-world!";
+static const char __pyx_k_Compiled_with_python_version_s[] = "Compiled with python version %s";
 static const char __pyx_k_home_romain_dev_waf_wrapper_waf[] = "/home/romain/dev/waf-wrapper/waf/playground/cython/src/cy_cxxtest.pyx";
+static PyObject *__pyx_kp_s_Compiled_with_python_version_s;
 static PyObject *__pyx_n_s_cline_in_traceback;
 static PyObject *__pyx_n_s_cy_cxxtest;
 static PyObject *__pyx_n_s_end;
@@ -1045,12 +1049,12 @@ static PyObject *__pyx_pf_10cy_cxxtest_pyhello(CYTHON_UNUSED PyObject *__pyx_sel
 static PyObject *__pyx_codeobj_;
 /* Late includes */
 
-/* "cy_cxxtest.pyx":3
+/* "cy_cxxtest.pyx":4
  * cimport cy_cxxtest
  * 
  * def pyhello():             # <<<<<<<<<<<<<<
  *     cy_cxxtest.hello()
- * 
+ *     print("Compiled with python version %s" % PY_VERSION)
  */
 
 /* Python wrapper */
@@ -1070,58 +1074,79 @@ static PyObject *__pyx_pw_10cy_cxxtest_1pyhello(PyObject *__pyx_self, CYTHON_UNU
 static PyObject *__pyx_pf_10cy_cxxtest_pyhello(CYTHON_UNUSED PyObject *__pyx_self) {
   PyObject *__pyx_r = NULL;
   __Pyx_RefNannyDeclarations
+  PyObject *__pyx_t_1 = NULL;
+  PyObject *__pyx_t_2 = NULL;
   __Pyx_RefNannySetupContext("pyhello", 0);
 
-  /* "cy_cxxtest.pyx":4
+  /* "cy_cxxtest.pyx":5
  * 
  * def pyhello():
  *     cy_cxxtest.hello()             # <<<<<<<<<<<<<<
+ *     print("Compiled with python version %s" % PY_VERSION)
  * 
- * cdef public api void cy_hello():
  */
   hello();
 
-  /* "cy_cxxtest.pyx":3
+  /* "cy_cxxtest.pyx":6
+ * def pyhello():
+ *     cy_cxxtest.hello()
+ *     print("Compiled with python version %s" % PY_VERSION)             # <<<<<<<<<<<<<<
+ * 
+ * cdef public api void cy_hello():
+ */
+  __pyx_t_1 = __Pyx_PyObject_FromString(PY_VERSION); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 6, __pyx_L1_error)
+  __Pyx_GOTREF(__pyx_t_1);
+  __pyx_t_2 = __Pyx_PyString_Format(__pyx_kp_s_Compiled_with_python_version_s, __pyx_t_1); if (unlikely(!__pyx_t_2)) __PYX_ERR(0, 6, __pyx_L1_error)
+  __Pyx_GOTREF(__pyx_t_2);
+  __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
+  if (__Pyx_PrintOne(0, __pyx_t_2) < 0) __PYX_ERR(0, 6, __pyx_L1_error)
+  __Pyx_DECREF(__pyx_t_2); __pyx_t_2 = 0;
+
+  /* "cy_cxxtest.pyx":4
  * cimport cy_cxxtest
  * 
  * def pyhello():             # <<<<<<<<<<<<<<
  *     cy_cxxtest.hello()
- * 
+ *     print("Compiled with python version %s" % PY_VERSION)
  */
 
   /* function exit code */
   __pyx_r = Py_None; __Pyx_INCREF(Py_None);
+  goto __pyx_L0;
+  __pyx_L1_error:;
+  __Pyx_XDECREF(__pyx_t_1);
+  __Pyx_XDECREF(__pyx_t_2);
+  __Pyx_AddTraceback("cy_cxxtest.pyhello", __pyx_clineno, __pyx_lineno, __pyx_filename);
+  __pyx_r = NULL;
+  __pyx_L0:;
   __Pyx_XGIVEREF(__pyx_r);
   __Pyx_RefNannyFinishContext();
   return __pyx_r;
 }
 
-/* "cy_cxxtest.pyx":6
- *     cy_cxxtest.hello()
+/* "cy_cxxtest.pyx":8
+ *     print("Compiled with python version %s" % PY_VERSION)
  * 
  * cdef public api void cy_hello():             # <<<<<<<<<<<<<<
  *     print("hello cython-world!")
- * 
  */
 
 void cy_hello(void) {
   __Pyx_RefNannyDeclarations
   __Pyx_RefNannySetupContext("cy_hello", 0);
 
-  /* "cy_cxxtest.pyx":7
+  /* "cy_cxxtest.pyx":9
  * 
  * cdef public api void cy_hello():
  *     print("hello cython-world!")             # <<<<<<<<<<<<<<
- * 
  */
-  if (__Pyx_PrintOne(0, __pyx_kp_s_hello_cython_world) < 0) __PYX_ERR(0, 7, __pyx_L1_error)
+  if (__Pyx_PrintOne(0, __pyx_kp_s_hello_cython_world) < 0) __PYX_ERR(0, 9, __pyx_L1_error)
 
-  /* "cy_cxxtest.pyx":6
- *     cy_cxxtest.hello()
+  /* "cy_cxxtest.pyx":8
+ *     print("Compiled with python version %s" % PY_VERSION)
  * 
  * cdef public api void cy_hello():             # <<<<<<<<<<<<<<
  *     print("hello cython-world!")
- * 
  */
 
   /* function exit code */
@@ -1178,6 +1203,7 @@ static struct PyModuleDef __pyx_moduledef = {
 #endif
 
 static __Pyx_StringTabEntry __pyx_string_tab[] = {
+  {&__pyx_kp_s_Compiled_with_python_version_s, __pyx_k_Compiled_with_python_version_s, sizeof(__pyx_k_Compiled_with_python_version_s), 0, 0, 1, 0},
   {&__pyx_n_s_cline_in_traceback, __pyx_k_cline_in_traceback, sizeof(__pyx_k_cline_in_traceback), 0, 0, 1, 1},
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   {&__pyx_n_s_end, __pyx_k_end, sizeof(__pyx_k_end), 0, 0, 1, 1},
@@ -1199,14 +1225,14 @@ static CYTHON_SMALL_CODE int __Pyx_InitCachedConstants(void) {
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   __Pyx_RefNannySetupContext("__Pyx_InitCachedConstants", 0);
 
-  /* "cy_cxxtest.pyx":3
+  /* "cy_cxxtest.pyx":4
  * cimport cy_cxxtest
  * 
  * def pyhello():             # <<<<<<<<<<<<<<
  *     cy_cxxtest.hello()
- * 
+ *     print("Compiled with python version %s" % PY_VERSION)
  */
-  __pyx_codeobj_ = (PyObject*)__Pyx_PyCode_New(0, 0, 0, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_home_romain_dev_waf_wrapper_waf, __pyx_n_s_pyhello, 3, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj_)) __PYX_ERR(0, 3, __pyx_L1_error)
+  __pyx_codeobj_ = (PyObject*)__Pyx_PyCode_New(0, 0, 0, 0, CO_OPTIMIZED|CO_NEWLOCALS, __pyx_empty_bytes, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_empty_tuple, __pyx_kp_s_home_romain_dev_waf_wrapper_waf, __pyx_n_s_pyhello, 4, __pyx_empty_bytes); if (unlikely(!__pyx_codeobj_)) __PYX_ERR(0, 4, __pyx_L1_error)
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@@ -1485,22 +1511,22 @@ if (!__Pyx_RefNanny) {
   if (__Pyx_patch_abc() < 0) __PYX_ERR(0, 1, __pyx_L1_error)
   #endif
 
-  /* "cy_cxxtest.pyx":3
+  /* "cy_cxxtest.pyx":4
  * cimport cy_cxxtest
  * 
  * def pyhello():             # <<<<<<<<<<<<<<
  *     cy_cxxtest.hello()
- * 
+ *     print("Compiled with python version %s" % PY_VERSION)
  */
-  __pyx_t_1 = PyCFunction_NewEx(&__pyx_mdef_10cy_cxxtest_1pyhello, NULL, __pyx_n_s_cy_cxxtest); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 3, __pyx_L1_error)
+  __pyx_t_1 = PyCFunction_NewEx(&__pyx_mdef_10cy_cxxtest_1pyhello, NULL, __pyx_n_s_cy_cxxtest); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 4, __pyx_L1_error)
   __Pyx_GOTREF(__pyx_t_1);
-  if (PyDict_SetItem(__pyx_d, __pyx_n_s_pyhello, __pyx_t_1) < 0) __PYX_ERR(0, 3, __pyx_L1_error)
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   __Pyx_DECREF(__pyx_t_1); __pyx_t_1 = 0;
 
   /* "cy_cxxtest.pyx":1
- * cimport cy_cxxtest             # <<<<<<<<<<<<<<
+ * from cpython.version cimport PY_VERSION             # <<<<<<<<<<<<<<
+ * cimport cy_cxxtest
  * 
- * def pyhello():
  */
   __pyx_t_1 = __Pyx_PyDict_NewPresized(0); if (unlikely(!__pyx_t_1)) __PYX_ERR(0, 1, __pyx_L1_error)
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diff --git a/playground/cython/src/cy_ctest.pyx b/playground/cython/src/cy_ctest.pyx
index ddf4b0be..2fc1f96c 100644
--- a/playground/cython/src/cy_ctest.pyx
+++ b/playground/cython/src/cy_ctest.pyx
@@ -1,4 +1,7 @@
+from cpython.version cimport PY_VERSION
 cimport cy_ctest
+#cimport commented_import
 
 def pyhello():
     cy_ctest.hello()
+    print("Compiled with python version %s" % PY_VERSION)
diff --git a/playground/cython/src/cy_cxxtest.pyx b/playground/cython/src/cy_cxxtest.pyx
index 1102b97b..85edefc8 100644
--- a/playground/cython/src/cy_cxxtest.pyx
+++ b/playground/cython/src/cy_cxxtest.pyx
@@ -1,8 +1,9 @@
+from cpython.version cimport PY_VERSION
 cimport cy_cxxtest
 
 def pyhello():
     cy_cxxtest.hello()
+    print("Compiled with python version %s" % PY_VERSION)
 
 cdef public api void cy_hello():
     print("hello cython-world!")
-