gh-113212: Document zero-arg super() inside nested functions and generator expressions

WolframAlph · WolframAlph · commit adb9e791c6a1 · 2023-12-20T21:05:04.000+01:00
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst
@@ -1845,6 +1845,21 @@ are always available.  They are listed here in alphabetical order.
    :func:`super`, see `guide to using super()
    <https://rhettinger.wordpress.com/2011/05/26/super-considered-super/>`_.
 
+   .. note::
+      By default, if no second argument is provided, :func:`super` uses the first argument
+      of the immediately enclosing function definition, which is ``self`` under normal circumstances.
+      This may lead to unexpected behaviour if used inside nested functions or generator expressions
+      (the latter creates implicit nested functions). The following example will result in an exception::
+
+         class B(C):
+            def method(self, arg):
+               list(super().method(arg) for _ in range(1))   # Raises TypeError.
+
+      In such cases, you should provide arguments explicitly::
+
+         class B(C):
+            def method(self, arg):
+               list(super(B, self).method(arg) for _ in range(1))
 
 .. _func-tuple:
 .. class:: tuple()
diff --git a/Misc/NEWS.d/next/Core and Builtins/2023-12-20-08-54-54.gh-issue-113212.62AUlw.rst b/Misc/NEWS.d/next/Core and Builtins/2023-12-20-08-54-54.gh-issue-113212.62AUlw.rst
@@ -0,0 +1,2 @@
+improve :py:class:`super` error message && document zero-arg :py:class:`super` inside nested
+functions and generator expressions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	+improve :py:class:`super` error message && document zero-arg :py:class:`super` inside nested
	`2`	`+functions and generator expressions`