Fix builtins import in Python3

pcbnew/python/kicad_pyshell/__init__.py

@@ -63,8 +63,12 @@ class PcbnewPyShell(editor.EditorNotebookFrame):
         intro = 'Py %s' % version.VERSION
         import imp
         module = imp.new_module('__main__')
-        import __builtin__
-        module.__dict__['__builtins__'] = __builtin__
+        if sys.version_info >= (3,):
+            import builtins
+            module.__dict__['__builtins__'] = builtins
+        else:
+            import __builtin__
+            module.__dict__['__builtins__'] = __builtin__
         namespace = module.__dict__.copy()
 
         self.config_dir = pcbnew.GetKicadConfigPath()

pcbnew/swig/python_scripting.cpp

@@ -338,7 +338,13 @@ wxWindow* CreatePythonShellWindow( wxWindow* parent, const wxString& aFramenameI
     // executed.  Put a reference to the builtins module in it.
 
     PyObject*   globals     = PyDict_New();
+#if PY_MAJOR_VERSION >= 3
+    PyObject*   builtins    = PyImport_ImportModule( "builtins" );
+#else
     PyObject*   builtins    = PyImport_ImportModule( "__builtin__" );
+#endif
+
+    wxASSERT( builtins );
 
     PyDict_SetItemString( globals, "__builtins__", builtins );
     Py_DECREF( builtins );