diff --git a/plugins/extensions/pykrita/plugin/plugins/scripter/ui_scripter/actions/runaction/runaction.py b/plugins/extensions/pykrita/plugin/plugins/scripter/ui_scripter/actions/runaction/runaction.py
--- a/plugins/extensions/pykrita/plugin/plugins/scripter/ui_scripter/actions/runaction/runaction.py
+++ b/plugins/extensions/pykrita/plugin/plugins/scripter/ui_scripter/actions/runaction/runaction.py
@@ -5,6 +5,7 @@
 from . import docwrapper
 import os
 from scripter import resources_rc
+import importlib.util
 
 
 class RunAction(QAction):
@@ -28,16 +29,33 @@
         return 'toolBar'
 
     def run(self):
+        """ This method execute python code from an activeDocument (file) or direct
+            from editor (ui_scripter/editor/pythoneditor.py). When executing code
+            from a file, we use importlib to load this module/file and with
+            "users_script" name. That's implementation seeks for a "main()" function in the script.
+            When executing code from editor without creating a file, we compile
+            this script to bytecode and we execute this in an empty scope. That's
+            faster than use exec directly and cleaner, because we are using an empty scope. """
+
         self.scripter.uicontroller.setActiveWidget('OutPut')
         stdout = sys.stdout
         stderr = sys.stderr
         output = docwrapper.DocWrapper(self.output.document())
         output.write("======================================\n")
         sys.stdout = output
         sys.stderr = output
         script = self.editor.document().toPlainText()
+        document = self.scripter.documentcontroller.activeDocument
         try:
-            exec(script)
+            if document:
+                spec = importlib.util.spec_from_file_location("users_script", document.filePath)
+                users_module = importlib.util.module_from_spec(spec)
+                spec.loader.exec_module(users_module)
+                users_module.main()
+            else:
+                code = compile(script, '<string>', 'exec')
+                empty_scope = {}
+                exec(script, {})
         except Exception as e:
             self.scripter.uicontroller.showException(str(e))
         sys.stdout = stdout