diff options
| -rw-r--r-- | Lib/argparse.py | 5 | ||||
| -rw-r--r-- | Lib/test/test_argparse.py | 18 |
2 files changed, 22 insertions, 1 deletions
diff --git a/Lib/argparse.py b/Lib/argparse.py index adecb88..d5976e9 100644 --- a/Lib/argparse.py +++ b/Lib/argparse.py @@ -1709,9 +1709,12 @@ class ArgumentParser(_AttributeHolder, _ActionsContainer): return args def parse_known_args(self, args=None, namespace=None): - # args default to the system args if args is None: + # args default to the system args args = _sys.argv[1:] + else: + # make sure that args are mutable + args = list(args) # default Namespace built from parser defaults if namespace is None: diff --git a/Lib/test/test_argparse.py b/Lib/test/test_argparse.py index 72060da..caf99af 100644 --- a/Lib/test/test_argparse.py +++ b/Lib/test/test_argparse.py @@ -4613,6 +4613,24 @@ class TestTypeFunctionCallWithNonStringDefault(TestCase): class TestParseKnownArgs(TestCase): + def test_arguments_tuple(self): + parser = argparse.ArgumentParser() + parser.parse_args(()) + + def test_arguments_list(self): + parser = argparse.ArgumentParser() + parser.parse_args([]) + + def test_arguments_tuple_positional(self): + parser = argparse.ArgumentParser() + parser.add_argument('x') + parser.parse_args(('x',)) + + def test_arguments_list_positional(self): + parser = argparse.ArgumentParser() + parser.add_argument('x') + parser.parse_args(['x']) + def test_optionals(self): parser = argparse.ArgumentParser() parser.add_argument('--foo') |