[issue14856] argparse: creating an already defined subparsers does not raises an exception

[R. David Murray]

R. David Murray <rdmurray at bitdance.com> added the comment:

Thanks for the report and patch.

However, since there is no del_parser method, I'm inclined to think that this is not a bug.  That is, the ability to overwrite a previously defined subparser could be considered a feature.

If Steven does consider it a bug, I think it can only be fixed in 3.3, since to do otherwise could needlessly break currently-working programs.  If it is not a bug, add_parser's behavior when a parser already exist should be documented.

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nosy: +bethard, r.david.murray
versions:  -Python 2.6, Python 2.7, Python 3.1, Python 3.2, Python 3.4

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