BF: iohub server prints / exceptions not appearing in Runner

fixes / closes #2766. iohub stderr is now redirected to psychopy runner stdout, which displays in the Running output area.
psychopy · Mar 19, 2021 · 30d0705 · 30d0705
1 parent 3315e4d
commit 30d0705
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/psychopy/iohub/client/__init__.py b/psychopy/iohub/client/__init__.py
@@ -937,7 +937,11 @@ def _startServer(self, ioHubConfig=None, ioHubConfigAbsPath=None):
 
         self._server_process = subprocess.Popen(subprocessArgList,
                                                 env=envars,
-                                                cwd=IOHUB_DIRECTORY)
+                                                cwd=IOHUB_DIRECTORY,
+                                                # set sub process stderr ro be stdout so PsychoPy Runner
+                                                # shows errors from iohub
+                                                stderr=subprocess.STDOUT,
+                                                )
 
         # Get iohub server pid and psutil process object
         # for affinity and process priority setting.