diff --git a/src/Gui/PythonEditor.cpp b/src/Gui/PythonEditor.cpp
index 02251ec59f..668f6b8029 100644
--- a/src/Gui/PythonEditor.cpp
+++ b/src/Gui/PythonEditor.cpp
@@ -238,25 +238,7 @@ void PythonEditor::keyPressEvent(QKeyEvent* e)
 
 void PythonEditor::onComment()
 {
-    QTextCursor cursor = textCursor();
-    int selStart = cursor.selectionStart();
-    int selEnd = cursor.selectionEnd();
-    QTextBlock block;
-    cursor.beginEditBlock();
-    for (block = document()->begin(); block.isValid(); block = block.next()) {
-        int pos = block.position();
-        int off = block.length()-1;
-        // at least one char of the block is part of the selection
-        if ( pos >= selStart || pos+off >= selStart) {
-            if ( pos+1 > selEnd )
-                break; // end of selection reached
-            cursor.setPosition(block.position());
-            cursor.insertText(QLatin1String("#"));
-                selEnd++;
-        }
-    }
-
-    cursor.endEditBlock();
+    prepend(QStringLiteral("#"));
 }
 
 void PythonEditor::onUncomment()
diff --git a/src/Gui/TextEdit.cpp b/src/Gui/TextEdit.cpp
index 68ae0efd99..0dc04b1d9c 100644
--- a/src/Gui/TextEdit.cpp
+++ b/src/Gui/TextEdit.cpp
@@ -495,6 +495,30 @@ PythonTextEditor::PythonTextEditor(QWidget *parent)
 
 PythonTextEditor::~PythonTextEditor() = default;
 
+void PythonTextEditor::prepend(const QString& str)
+{
+    QTextCursor cursor = textCursor();
+    // for each selected block insert a tab or spaces
+    int selStart = cursor.selectionStart();
+    int selEnd = cursor.selectionEnd();
+    QTextBlock block;
+    cursor.beginEditBlock();
+    for (block = document()->begin(); block.isValid(); block = block.next()) {
+        int pos = block.position();
+        int off = block.length()-1;
+        // at least one char of the block is part of the selection
+        if ( pos >= selStart || pos+off >= selStart) {
+            if ( pos+1 > selEnd )
+                break; // end of selection reached
+            cursor.setPosition(block.position());
+            cursor.insertText(str);
+            selEnd += str.length();
+        }
+    }
+
+    cursor.endEditBlock();
+}
+
 void PythonTextEditor::keyPressEvent (QKeyEvent * e)
 {
     if ( e->key() == Qt::Key_Tab ) {
@@ -511,25 +535,7 @@ void PythonTextEditor::keyPressEvent (QKeyEvent * e)
             cursor.insertText(ch);
             cursor.endEditBlock();
         } else {
-            // for each selected block insert a tab or spaces
-            int selStart = cursor.selectionStart();
-            int selEnd = cursor.selectionEnd();
-            QTextBlock block;
-            cursor.beginEditBlock();
-            for (block = document()->begin(); block.isValid(); block = block.next()) {
-                int pos = block.position();
-                int off = block.length()-1;
-                // at least one char of the block is part of the selection
-                if ( pos >= selStart || pos+off >= selStart) {
-                    if ( pos+1 > selEnd )
-                        break; // end of selection reached
-                    cursor.setPosition(block.position());
-                    cursor.insertText(ch);
-                    selEnd += ch.length();
-                }
-            }
-
-            cursor.endEditBlock();
+            prepend(ch);
         }
 
         return;
diff --git a/src/Gui/TextEdit.h b/src/Gui/TextEdit.h
index c24bf15b26..b0c43bfb35 100644
--- a/src/Gui/TextEdit.h
+++ b/src/Gui/TextEdit.h
@@ -139,6 +139,12 @@ public:
     explicit PythonTextEditor(QWidget *parent = nullptr);
     ~PythonTextEditor() override;
 
+public Q_SLOTS:
+    /** Inserts \a str at the beginning of each selected line or the current line if
+     * nothing is selected
+     */
+    void prepend(const QString& str);
+
 protected:
     void keyPressEvent(QKeyEvent *) override;
 };