From 705e35e5fd849482c961c9897cd554f92968ac5d Mon Sep 17 00:00:00 2001
From: Zackery Spytz <zspytz@gmail.com>
Date: Sun, 22 Nov 2020 11:16:49 -0700
Subject: [PATCH] bpo-32068: curses.textpad isn't handling the backspace key on
 some systems

On some systems, ascii.DEL (127) is sent on the backspace key event.
---
 Lib/curses/textpad.py                                        | 5 +++--
 .../next/Library/2020-11-22-11-15-55.bpo-32068.SkGl0R.rst    | 2 ++
 2 files changed, 5 insertions(+), 2 deletions(-)
 create mode 100644 Misc/NEWS.d/next/Library/2020-11-22-11-15-55.bpo-32068.SkGl0R.rst

diff --git a/Lib/curses/textpad.py b/Lib/curses/textpad.py
index 2079953a066..e4b7084def2 100644
--- a/Lib/curses/textpad.py
+++ b/Lib/curses/textpad.py
@@ -102,7 +102,8 @@ class Textbox:
                 self._insert_printable_char(ch)
         elif ch == curses.ascii.SOH:                           # ^a
             self.win.move(y, 0)
-        elif ch in (curses.ascii.STX,curses.KEY_LEFT, curses.ascii.BS,curses.KEY_BACKSPACE):
+        elif ch in (curses.ascii.STX, curses.KEY_LEFT, curses.ascii.BS,
+                    curses.KEY_BACKSPACE, curses.ascii.DEL):
             if x > 0:
                 self.win.move(y, x-1)
             elif y == 0:
@@ -111,7 +112,7 @@ class Textbox:
                 self.win.move(y-1, self._end_of_line(y-1))
             else:
                 self.win.move(y-1, self.maxx)
-            if ch in (curses.ascii.BS, curses.KEY_BACKSPACE):
+            if ch in (curses.ascii.BS, curses.KEY_BACKSPACE, curses.ascii.DEL):
                 self.win.delch()
         elif ch == curses.ascii.EOT:                           # ^d
             self.win.delch()
diff --git a/Misc/NEWS.d/next/Library/2020-11-22-11-15-55.bpo-32068.SkGl0R.rst b/Misc/NEWS.d/next/Library/2020-11-22-11-15-55.bpo-32068.SkGl0R.rst
new file mode 100644
index 00000000000..5191078ad2b
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2020-11-22-11-15-55.bpo-32068.SkGl0R.rst
@@ -0,0 +1,2 @@
+The :mod:`curses.textpad` module can now handle systems that send
+``ascii.DEL`` (``127``) on the backspace key event.