Merge pull request #23712 from mantidproject/workbench_print_statemets

Duplicate print statements to the console

qt/applications/workbench/workbench/plugins/logmessagedisplay.py

@@ -29,6 +29,8 @@ from workbench.plugins.base import PluginWidget
 
 # Default logs at notice
 DEFAULT_LOG_PRIORITY = 5
+ORIGINAL_STDOUT = sys.stdout
+ORIGINAL_STDERR = sys.stderr
 
 
 class LogMessageDisplay(PluginWidget):
@@ -44,10 +46,10 @@ class LogMessageDisplay(PluginWidget):
         self.setWindowTitle(self.get_plugin_title())
 
         # output capture
-        stdout_capture, stderr_capture = WriteToSignal(), WriteToSignal()
-        stdout_capture.sig_write_received.connect(self.display.appendNotice)
-        stderr_capture.sig_write_received.connect(self.display.appendError)
-        self.stdout, self.stderr = stdout_capture, stderr_capture
+        self.stdout = WriteToSignal(ORIGINAL_STDOUT)
+        self.stdout.sig_write_received.connect(self.display.appendNotice)
+        self.stderr = WriteToSignal(ORIGINAL_STDERR)
+        self.stderr.sig_write_received.connect(self.display.appendError)
 
     def get_plugin_title(self):
         return "Messages"

qt/python/mantidqt/utils/test/test_writetosignal.py

@@ -18,6 +18,7 @@ from __future__ import (absolute_import)
 
 # std imports
 import unittest
+import sys
 
 # 3rdparty
 from qtpy.QtCore import QCoreApplication, QObject
@@ -38,7 +39,7 @@ class WriteToSignalTest(GuiTest):
 
     def test_connected_receiver_receives_text(self):
         recv = Receiver()
-        writer = WriteToSignal()
+        writer = WriteToSignal(sys.stdout)
         writer.sig_write_received.connect(recv.capture_text)
         txt = "I expect to see this"
         writer.write(txt)

qt/python/mantidqt/utils/writetosignal.py

@@ -27,6 +27,9 @@ class WriteToSignal(QObject):
     used to transform write requests to
     Qt-signals. Mainly used to communicate
     stdout/stderr across threads"""
+    def __init__(self, original_out):
+        QObject.__init__(self)
+        self.__original_out = original_out
 
     sig_write_received = Signal(str)
 
@@ -40,4 +43,7 @@ class WriteToSignal(QObject):
         return False
 
     def write(self, txt):
+        # write to the console
+        self.__original_out.write(txt)
+        # emit the signal which will write to logging
         self.sig_write_received.emit(txt)