[3.13] pythongh-133881: add forward reference to list.sort() in lambda expression tutorial (pythonGH-133910) (python#134127)

miss-islington · Shepard2154 · web-flow · commit c52987054271 · 2025-05-17T08:05:41.000Z
pythongh-133881: add forward reference to `list.sort()` in lambda expression tutorial (pythonGH-133910) (cherry picked from commit c1c9ad1) Co-authored-by: Oleg Burnaev <51371645+Shepard2154@users.noreply.github.com>
diff --git a/Doc/tutorial/controlflow.rst b/Doc/tutorial/controlflow.rst
@@ -998,7 +998,8 @@ scope::
    43
 
 The above example uses a lambda expression to return a function.  Another use
-is to pass a small function as an argument::
+is to pass a small function as an argument.  For instance, :meth:`list.sort`
+takes a sorting key function *key* which can be a lambda function::
 
    >>> pairs = [(1, 'one'), (2, 'two'), (3, 'three'), (4, 'four')]
    >>> pairs.sort(key=lambda pair: pair[1])

Original file line number	Diff line number	Diff line change
`@@ -998,7 +998,8 @@ scope::`
`998`	`998`	`43`
`999`	`999`
`1000`	`1000`	`The above example uses a lambda expression to return a function. Another use`
`1001`		`-is to pass a small function as an argument::`
	`1001`	+is to pass a small function as an argument. For instance, :meth:`list.sort`
	`1002`	`+takes a sorting key function key which can be a lambda function::`
`1002`	`1003`
`1003`	`1004`	`>>> pairs = [(1, 'one'), (2, 'two'), (3, 'three'), (4, 'four')]`
`1004`	`1005`	`>>> pairs.sort(key=lambda pair: pair[1])`