no the print in the experiment and result script are also printed

src/damaris/gui/ResultHandling.py

@@ -7,7 +7,7 @@ import traceback
 import logging
 import ast
 from damaris.data import Resultable
-from damaris.gui.ExperimentHandling import StopExperiment
+from damaris.gui.ExperimentHandling import StopExperiment, _SandboxStdout
 
 logger = logging.getLogger("damaris.result_handling")
 
@@ -16,16 +16,24 @@ class ResultHandling(threading.Thread):
     runs the result script in sandbox
     """
 
-    def __init__(self, script_data, result_iterator, data_pool):
+    def __init__(self, script_data, result_iterator, data_pool, log_callback=None):
         threading.Thread.__init__(self,name="result handler")
         self.script=script_data
         self.results=result_iterator
         self.data_space=data_pool
         self.quit_flag=self.results.quit_flag
+        self._log_callback = log_callback
         if self.data_space is not None:
             self.data_space["__recentresult"]=-1
 
     def run(self):
+        # Redirect stdout/stderr so print() in sandboxed scripts goes to the GUI
+        _orig_stdout = sys.stdout
+        _orig_stderr = sys.stderr
+        if self._log_callback is not None:
+            sys.stdout = _SandboxStdout(self._log_callback)
+            sys.stderr = _SandboxStdout(self._log_callback)
+
         # execute it
         dataspace={}
         data_classes = __import__('damaris.data', dataspace, dataspace, ['*'])
@@ -88,6 +96,10 @@ class ResultHandling(threading.Thread):
             traceback_file=None
             dataspace=None
 
+        # Restore stdout/stderr
+        sys.stdout = _orig_stdout
+        sys.stderr = _orig_stderr
+
     def sleep(self, seconds):
         self.quit_flag.wait(seconds)
         if self.quit_flag.isSet():