From: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Date: Tue, 9 Jun 2026 15:45:23 +0000 (+0200)
Subject: [3.15] GH-54732: Tweak wording around empty lines in argument files (GH-150980) ... 
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=804be0a2236b7c207d84a440bbf2c12f0bced8f7;p=thirdparty%2FPython%2Fcpython.git

[3.15] GH-54732: Tweak wording around empty lines in argument files (GH-150980) (#151165)

GH-54732: Tweak wording around empty lines in argument files (GH-150980)
(cherry picked from commit 528550e0e753d64714f65a02d567bdc1d63ae3f1)

Co-authored-by: Savannah Ostrowski <savannah@python.org>
---

diff --git a/Doc/library/argparse.rst b/Doc/library/argparse.rst
index db5fae200667..622f844a4a0b 100644
--- a/Doc/library/argparse.rst
+++ b/Doc/library/argparse.rst
@@ -442,9 +442,8 @@ is considered equivalent to the expression ``['-f', 'foo', '-f', 'bar']``.
 
 .. note::
 
-   Empty lines are treated as empty strings (``''``), which are allowed as values but
-   not as arguments. Empty lines that are read as arguments will result in an
-   "unrecognized arguments" error.
+   Each line is treated as a single argument, so an empty line is read as an
+   empty string (``''``).
 
 :class:`ArgumentParser` uses :term:`filesystem encoding and error handler`
 to read the file containing arguments.
@@ -2232,6 +2231,9 @@ Customizing file parsing
         def convert_arg_line_to_args(self, arg_line):
             return arg_line.split()
 
+   Note that with this override an argument can no longer contain spaces, since
+   each space-separated word becomes a separate argument.
+
 
 Exiting methods
 ^^^^^^^^^^^^^^^