May 16, 2025
diff --git a/Lib/argparse.py b/Lib/argparse.py
                              errors=_sys.getfilesystemencodeerrors()) as args_file:
                        arg_strings = []
                        for arg_line in args_file.read().splitlines():
                            if not arg_line.strip():
                                continue
                            for arg in self.convert_arg_line_to_args(arg_line):
                                arg_strings.append(arg)
                        arg_strings = self._read_args_from_files(arg_strings)
diff --git a/Lib/test/test_argparse.py b/Lib/test/test_argparse.py
                          b'@hello'),
            ('invalid', b'@no-such-path\n'),
            ('undecodable', self.undecodable + b'\n'),
            ('blanklines', b'spam\n\nham\n')
        ]
        for path, text in file_texts:
            with open(path, 'wb') as file:
        ('-a B @recursive Y Z', NS(a='A', x=hello, y=['Y', 'Z'])),
        ('X @recursive Z -a B', NS(a='B', x='X', y=[hello, 'Z'])),
        (["-a", "", "X", "Y"], NS(a='', x='X', y=['Y'])),
        ('@blanklines', NS(a=None, x='spam', y=['ham'])),
    ]
    if os_helper.TESTFN_UNDECODABLE:
        undecodable = os_helper.TESTFN_UNDECODABLE.lstrip(b'@')
diff --git a/Misc/NEWS.d/next/Library/2025-05-16-21-54-00.gh-issue-54732.asfjdf.rst b/Misc/NEWS.d/next/Library/2025-05-16-21-54-00.gh-issue-54732.asfjdf.rst
 Fix issue in :mod:`argparse` where an args file with blank lines could not be parsed.
Original file line number	Diff line number	Diff line change
Expand Up		@@ -2363,6 +2363,8 @@ def _read_args_from_files(self, arg_strings):
		errors=_sys.getfilesystemencodeerrors()) as args_file:
		arg_strings = []
		for arg_line in args_file.read().splitlines():
		if not arg_line.strip():
		continue
		for arg in self.convert_arg_line_to_args(arg_line):
		arg_strings.append(arg)
		arg_strings = self._read_args_from_files(arg_strings)
Expand Down
Original file line number	Diff line number	Diff line change
Expand Up		@@ -1715,6 +1715,7 @@ def setUp(self):
		b'@hello'),
		('invalid', b'@no-such-path\n'),
		('undecodable', self.undecodable + b'\n'),
		('blanklines', b'spam\n\nham\n')
		]
		for path, text in file_texts:
		with open(path, 'wb') as file:
Expand All		@@ -1736,6 +1737,7 @@ def setUp(self):
		('-a B @recursive Y Z', NS(a='A', x=hello, y=['Y', 'Z'])),
		('X @recursive Z -a B', NS(a='B', x='X', y=[hello, 'Z'])),
		(["-a", "", "X", "Y"], NS(a='', x='X', y=['Y'])),
		('@blanklines', NS(a=None, x='spam', y=['ham'])),
		]
		if os_helper.TESTFN_UNDECODABLE:
		undecodable = os_helper.TESTFN_UNDECODABLE.lstrip(b'@')
Expand Down
Original file line number	Diff line number	Diff line change
		@@ -0,0 +1 @@
		Fix issue in :mod:`argparse` where an args file with blank lines could not be parsed.