[issue45235] argparse does not preserve namespace with subparser defaults

[paul j3]

paul j3 <ajipanca at gmail.com> added the comment:

parser = argparse.ArgumentParser()
    sub = parser.add_subparsers()
    example_subparser = sub.add_parser("example")
    example_subparser.add_argument("--flag", default=10)
    print(parser.parse_args(["example","--flag=15"], argparse.Namespace(flag=20)))

still returns flag=20

User input should override values set by the provided Namespace.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue45235>
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