#13039 allow proper deletion of '>>> ' in IDLE editor windows.

terryjreedy · terryjreedy · commit 7f53aea53b4b · 2012-01-15T19:03:23.000-05:00
Patch by Roger Serwy.
diff --git a/Lib/idlelib/EditorWindow.py b/Lib/idlelib/EditorWindow.py
@@ -1134,7 +1134,10 @@ def smart_backspace_event(self, event):
         assert have > 0
         want = ((have - 1) // self.indentwidth) * self.indentwidth
         # Debug prompt is multilined....
-        last_line_of_prompt = sys.ps1.split('\n')[-1]
+        if self.context_use_ps1:
+            last_line_of_prompt = sys.ps1.split('\n')[-1]
+        else:
+            last_line_of_prompt = ''
         ncharsdeleted = 0
         while 1:
             if chars == last_line_of_prompt:
