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-rw-r--r--Doc/reference/datamodel.rst4
1 files changed, 4 insertions, 0 deletions
diff --git a/Doc/reference/datamodel.rst b/Doc/reference/datamodel.rst
index 4f19b37cd2..b2aa98bf71 100644
--- a/Doc/reference/datamodel.rst
+++ b/Doc/reference/datamodel.rst
@@ -1226,6 +1226,10 @@ Basic customization
The return value must be a string object.
+ .. versionchanged:: 3.4
+ The __format__ method of ``object`` itself raises a :exc:`TypeError`
+ if passed any non-empty string.
+
.. _richcmpfuncs:
.. method:: object.__lt__(self, other)