https://github.com/python/cpython/commit/9b31a2d83fa7cb0fe4d75ce7cf6a2c9ea2ce0728 commit: 9b31a2d83fa7cb0fe4d75ce7cf6a2c9ea2ce0728 branch: main author: Serhiy Storchaka <[email protected]> committer: serhiy-storchaka <[email protected]> date: 2024-10-02T11:28:02+03:00 summary:
gh-58282: Fix support of tuple metavar for positional arguments in argparse (GH-124782) Previously, formatting help output or error message for positional argument with a tuple metavar raised exception. Co-authored-by: Cyker Way <[email protected]> files: A Misc/NEWS.d/next/Library/2018-12-04-07-36-27.bpo-14074.fMLKCu.rst M Lib/argparse.py M Lib/test/test_argparse.py diff --git a/Lib/argparse.py b/Lib/argparse.py index 4b12c2f0c6f857..21299b69ecd74c 100644 --- a/Lib/argparse.py +++ b/Lib/argparse.py @@ -527,8 +527,7 @@ def _format_action(self, action): def _format_action_invocation(self, action): if not action.option_strings: default = self._get_default_metavar_for_positional(action) - metavar, = self._metavar_formatter(action, default)(1) - return metavar + return ' '.join(self._metavar_formatter(action, default)(1)) else: @@ -703,7 +702,15 @@ def _get_action_name(argument): elif argument.option_strings: return '/'.join(argument.option_strings) elif argument.metavar not in (None, SUPPRESS): - return argument.metavar + metavar = argument.metavar + if not isinstance(metavar, tuple): + return metavar + if argument.nargs == ZERO_OR_MORE and len(metavar) == 2: + return '%s[, %s]' % metavar + elif argument.nargs == ONE_OR_MORE: + return '%s[, %s]' % metavar + else: + return ', '.join(metavar) elif argument.dest not in (None, SUPPRESS): return argument.dest elif argument.choices: diff --git a/Lib/test/test_argparse.py b/Lib/test/test_argparse.py index 057379cec91ba9..7530e8469abf10 100644 --- a/Lib/test/test_argparse.py +++ b/Lib/test/test_argparse.py @@ -4898,7 +4898,7 @@ class TestHelpNone(HelpTestCase): version = '' -class TestHelpTupleMetavar(HelpTestCase): +class TestHelpTupleMetavarOptional(HelpTestCase): """Test specifying metavar as a tuple""" parser_signature = Sig(prog='PROG') @@ -4925,6 +4925,34 @@ class TestHelpTupleMetavar(HelpTestCase): version = '' +class TestHelpTupleMetavarPositional(HelpTestCase): + """Test specifying metavar on a Positional as a tuple""" + + parser_signature = Sig(prog='PROG') + argument_signatures = [ + Sig('w', help='w help', nargs='+', metavar=('W1', 'W2')), + Sig('x', help='x help', nargs='*', metavar=('X1', 'X2')), + Sig('y', help='y help', nargs=3, metavar=('Y1', 'Y2', 'Y3')), + Sig('z', help='z help', nargs='?', metavar=('Z1',)), + ] + argument_group_signatures = [] + usage = '''\ + usage: PROG [-h] W1 [W2 ...] [X1 [X2 ...]] Y1 Y2 Y3 [Z1] + ''' + help = usage + '''\ + + positional arguments: + W1 W2 w help + X1 X2 x help + Y1 Y2 Y3 y help + Z1 z help + + options: + -h, --help show this help message and exit + ''' + version = '' + + class TestHelpRawText(HelpTestCase): """Test the RawTextHelpFormatter""" @@ -6521,6 +6549,27 @@ def test_required_args(self): 'the following arguments are required: bar, baz$', self.parser.parse_args, []) + def test_required_args_with_metavar(self): + self.parser.add_argument('bar') + self.parser.add_argument('baz', metavar='BaZ') + self.assertRaisesRegex(argparse.ArgumentError, + 'the following arguments are required: bar, BaZ$', + self.parser.parse_args, []) + + def test_required_args_n(self): + self.parser.add_argument('bar') + self.parser.add_argument('baz', nargs=3) + self.assertRaisesRegex(argparse.ArgumentError, + 'the following arguments are required: bar, baz$', + self.parser.parse_args, []) + + def test_required_args_n_with_metavar(self): + self.parser.add_argument('bar') + self.parser.add_argument('baz', nargs=3, metavar=('B', 'A', 'Z')) + self.assertRaisesRegex(argparse.ArgumentError, + 'the following arguments are required: bar, B, A, Z$', + self.parser.parse_args, []) + def test_required_args_optional(self): self.parser.add_argument('bar') self.parser.add_argument('baz', nargs='?') @@ -6535,6 +6584,20 @@ def test_required_args_zero_or_more(self): 'the following arguments are required: bar$', self.parser.parse_args, []) + def test_required_args_one_or_more(self): + self.parser.add_argument('bar') + self.parser.add_argument('baz', nargs='+') + self.assertRaisesRegex(argparse.ArgumentError, + 'the following arguments are required: bar, baz$', + self.parser.parse_args, []) + + def test_required_args_one_or_more_with_metavar(self): + self.parser.add_argument('bar') + self.parser.add_argument('baz', nargs='+', metavar=('BaZ1', 'BaZ2')) + self.assertRaisesRegex(argparse.ArgumentError, + r'the following arguments are required: bar, BaZ1\[, BaZ2]$', + self.parser.parse_args, []) + def test_required_args_remainder(self): self.parser.add_argument('bar') self.parser.add_argument('baz', nargs='...') @@ -6550,6 +6613,39 @@ def test_required_mutually_exclusive_args(self): 'one of the arguments --bar --baz is required', self.parser.parse_args, []) + def test_conflicting_mutually_exclusive_args_optional_with_metavar(self): + group = self.parser.add_mutually_exclusive_group() + group.add_argument('--bar') + group.add_argument('baz', nargs='?', metavar='BaZ') + self.assertRaisesRegex(argparse.ArgumentError, + 'argument BaZ: not allowed with argument --bar$', + self.parser.parse_args, ['--bar', 'a', 'b']) + self.assertRaisesRegex(argparse.ArgumentError, + 'argument --bar: not allowed with argument BaZ$', + self.parser.parse_args, ['a', '--bar', 'b']) + + def test_conflicting_mutually_exclusive_args_zero_or_more_with_metavar1(self): + group = self.parser.add_mutually_exclusive_group() + group.add_argument('--bar') + group.add_argument('baz', nargs='*', metavar=('BAZ1',)) + self.assertRaisesRegex(argparse.ArgumentError, + 'argument BAZ1: not allowed with argument --bar$', + self.parser.parse_args, ['--bar', 'a', 'b']) + self.assertRaisesRegex(argparse.ArgumentError, + 'argument --bar: not allowed with argument BAZ1$', + self.parser.parse_args, ['a', '--bar', 'b']) + + def test_conflicting_mutually_exclusive_args_zero_or_more_with_metavar2(self): + group = self.parser.add_mutually_exclusive_group() + group.add_argument('--bar') + group.add_argument('baz', nargs='*', metavar=('BAZ1', 'BAZ2')) + self.assertRaisesRegex(argparse.ArgumentError, + r'argument BAZ1\[, BAZ2]: not allowed with argument --bar$', + self.parser.parse_args, ['--bar', 'a', 'b']) + self.assertRaisesRegex(argparse.ArgumentError, + r'argument --bar: not allowed with argument BAZ1\[, BAZ2]$', + self.parser.parse_args, ['a', '--bar', 'b']) + def test_ambiguous_option(self): self.parser.add_argument('--foobaz') self.parser.add_argument('--fooble', action='store_true') diff --git a/Misc/NEWS.d/next/Library/2018-12-04-07-36-27.bpo-14074.fMLKCu.rst b/Misc/NEWS.d/next/Library/2018-12-04-07-36-27.bpo-14074.fMLKCu.rst new file mode 100644 index 00000000000000..221c8e05fa98aa --- /dev/null +++ b/Misc/NEWS.d/next/Library/2018-12-04-07-36-27.bpo-14074.fMLKCu.rst @@ -0,0 +1,2 @@ +Fix :mod:`argparse` metavar processing to allow positional arguments to have a +tuple metavar. _______________________________________________ Python-checkins mailing list -- [email protected] To unsubscribe send an email to [email protected] https://mail.python.org/mailman3/lists/python-checkins.python.org/ Member address: [email protected]
