[issue17499] inspect.Signature and inspect.Parameter objects are mutable

[Brett Cannon]

Brett Cannon added the comment:

So what do you propose as a solution? Do you want to subclass tuple and then override __getitem__() so they can't index into the underlying tuple? Use __mangled names?

I mean if people are going to break the API to muck with stuff we can't stop them (nor can they complain if their code breaks).

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versions:  -Python 3.3

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<http://bugs.python.org/issue17499>
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