diff --git a/Lib/tkinter/__init__.py b/Lib/tkinter/__init__.py
index a3378d012fb41a..8e221c7d6d74f0 100644
--- a/Lib/tkinter/__init__.py
+++ b/Lib/tkinter/__init__.py
@@ -1385,10 +1385,18 @@ def bind(self, sequence=None, func=None, add=None):
return self._bind(('bind', self._w), sequence, func, add)
def unbind(self, sequence, funcid=None):
- """Unbind for this widget for event SEQUENCE the
- function identified with FUNCID."""
- self.tk.call('bind', self._w, sequence, '')
- if funcid:
+ """Unbind for this widget the event SEQUENCE.
+
+ If FUNCID is given, only unbind the function identified with FUNCID
+ and also delete that command.
+ """
+ if funcid is None:
+ self.tk.call('bind', self._w, sequence, '')
+ else:
+ funcs = self.tk.call('bind', self._w, sequence, None).split('\n')
+ keep = '\n'.join(f for f in funcs
+ if not f.startswith(f'if {{"[{funcid}'))
+ self.tk.call('bind', self._w, sequence, keep)
self.deletecommand(funcid)
def bind_all(self, sequence=None, func=None, add=None):
diff --git a/Misc/NEWS.d/next/Library/2020-01-11-22-09-29.bpo-31485.DSvjsY.rst b/Misc/NEWS.d/next/Library/2020-01-11-22-09-29.bpo-31485.DSvjsY.rst
new file mode 100644
index 00000000000000..b23b70e616257f
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2020-01-11-22-09-29.bpo-31485.DSvjsY.rst
@@ -0,0 +1 @@
+https://github.com/python/cpython/pull/17954#
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