[Python-checkins] [3.8] bpo-36540: Improve doc of function definition regarding positional-only arguments (GH-25235) (GH-25260)

[pablogsal]

https://github.com/python/cpython/commit/4554ab435727a0f3b6441c9c1a8d3fe6534433c7
commit: 4554ab435727a0f3b6441c9c1a8d3fe6534433c7
branch: 3.8
author: Saiyang Gou <gousaiyang at 163.com>
committer: pablogsal <Pablogsal at gmail.com>
date: 2021-04-07T20:32:24+01:00
summary:

[3.8] bpo-36540: Improve doc of function definition regarding positional-only arguments (GH-25235) (GH-25260)

(cherry picked from commit 58d72cab89cf9652acc0bf0007aa20b2bcc98499)

Co-authored-by: Saiyang Gou <gousaiyang at 163.com>

files:
M Doc/reference/compound_stmts.rst

diff --git a/Doc/reference/compound_stmts.rst b/Doc/reference/compound_stmts.rst
index 61037d97a0c3c..9dd471a0c83ec 100644
--- a/Doc/reference/compound_stmts.rst
+++ b/Doc/reference/compound_stmts.rst
@@ -582,19 +582,25 @@ e.g.::
        return penguin
 
 .. index::
+   single: / (slash); function definition
    single: * (asterisk); function definition
    single: **; function definition
 
 Function call semantics are described in more detail in section :ref:`calls`. A
 function call always assigns values to all parameters mentioned in the parameter
-list, either from position arguments, from keyword arguments, or from default
+list, either from positional arguments, from keyword arguments, or from default
 values.  If the form "``*identifier``" is present, it is initialized to a tuple
 receiving any excess positional parameters, defaulting to the empty tuple.
 If the form "``**identifier``" is present, it is initialized to a new
 ordered mapping receiving any excess keyword arguments, defaulting to a
 new empty mapping of the same type.  Parameters after "``*``" or
 "``*identifier``" are keyword-only parameters and may only be passed
-used keyword arguments.
+by keyword arguments.  Parameters before "``/``" are positional-only parameters
+and may only be passed by positional arguments.
+
+.. versionchanged:: 3.8
+   The ``/`` function parameter syntax may be used to indicate positional-only
+   parameters. See :pep:`570` for details.
 
 .. index::
    pair: function; annotations