From: Kumar Aditya <kumaraditya@python.org>
Date: Thu, 9 Jan 2025 10:10:45 +0000 (+0530)
Subject: gh-126137: improve docs for `loop.add_reader` and `loop.add_writer` (#128666)
X-Git-Tag: v3.14.0a4~60
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=b2adf556747d080f04b53ba4063b627c2dbe41d1;p=thirdparty%2FPython%2Fcpython.git

gh-126137: improve docs for `loop.add_reader` and `loop.add_writer` (#128666)
---

diff --git a/Doc/library/asyncio-eventloop.rst b/Doc/library/asyncio-eventloop.rst
index bfc0d16f023e..072ab206f25e 100644
--- a/Doc/library/asyncio-eventloop.rst
+++ b/Doc/library/asyncio-eventloop.rst
@@ -970,6 +970,9 @@ Watching file descriptors
    invoke *callback* with the specified arguments once *fd* is available for
    reading.
 
+   Any preexisting callback registered for *fd* is cancelled and replaced by
+   *callback*.
+
 .. method:: loop.remove_reader(fd)
 
    Stop monitoring the *fd* file descriptor for read availability. Returns
@@ -981,6 +984,9 @@ Watching file descriptors
    invoke *callback* with the specified arguments once *fd* is available for
    writing.
 
+   Any preexisting callback registered for *fd* is cancelled and replaced by
+   *callback*.
+
    Use :func:`functools.partial` :ref:`to pass keyword arguments
    <asyncio-pass-keywords>` to *callback*.