diff --git a/Misc/NEWS.d/next/Tools-Demos/2020-12-23-19-42-11.bpo-42726.a5EkTv.rst b/Misc/NEWS.d/next/Tools-Demos/2020-12-23-19-42-11.bpo-42726.a5EkTv.rst
new file mode 100644
index 00000000000..01a6e7fe55f
--- /dev/null
+++ b/Misc/NEWS.d/next/Tools-Demos/2020-12-23-19-42-11.bpo-42726.a5EkTv.rst
@@ -0,0 +1,2 @@
+Fixed Python 3 compatibility issue with gdb/libpython.py handling of attribute
+dictionaries.
diff --git a/Tools/gdb/libpython.py b/Tools/gdb/libpython.py
index ffb1813720e..aa674f6be60 100755
--- a/Tools/gdb/libpython.py
+++ b/Tools/gdb/libpython.py
@@ -468,7 +468,7 @@ class InstanceProxy(object):
     def __repr__(self):
         if isinstance(self.attrdict, dict):
             kwargs = ', '.join(["%s=%r" % (arg, val)
-                                for arg, val in self.attrdict.iteritems()])
+                                for arg, val in self.attrdict.items()])
             return '<%s(%s) at remote 0x%x>' % (self.cl_name,
                                                 kwargs, self.address)
         else: