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# DP: Fix issue #15847: allow args to be a tuple in parse_args.
diff -r edbf37ace03c -r a2147bbf7868 Lib/argparse.py
--- a/Lib/argparse.py Fri Sep 07 23:49:07 2012 +0200
+++ b/Lib/argparse.py Sat Sep 08 12:15:25 2012 -0400
@@ -1692,9 +1692,12 @@
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 -r edbf37ace03c -r a2147bbf7868 Lib/test/test_argparse.py
--- a/Lib/test/test_argparse.py Fri Sep 07 23:49:07 2012 +0200
+++ b/Lib/test/test_argparse.py Sat Sep 08 12:15:25 2012 -0400
@@ -4486,6 +4486,24 @@
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')
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