inspect.signature: Support duck-types of Python functions (Cython, for instance) #17159
diff --git a/Doc/whatsnew/3.4.rst b/Doc/whatsnew/3.4.rst
index c9c0da7..167cac8 100644
--- a/Doc/whatsnew/3.4.rst
+++ b/Doc/whatsnew/3.4.rst
@@ -793,6 +793,10 @@
recommended to update your code to use :func:`~inspect.signature`
directly. (Contributed by Yury Selivanov in :issue:`17481`)
+:func:`~inspect.signature` now supports duck types of CPython functions,
+which adds support for functions compiled with Cython. (Contributed
+by Stefan Behnel and Yury Selivanov in :issue:`17159`)
+
logging
-------