[issue7976] warnings should provide a public API for accessing its option parsing code

[Bruno Dupuis]

Bruno Dupuis added the comment:

Thanks, I'll write the doc.

Now, I'm not sure that keeping _OptionError as WarningsOptParsingError base class is a good idea. I can't see any use case to catch this exception outside the module and I'm quite sure nobody ever has. However, I tend to be over-conservative when it comes to backward-compatibility, even for underscore names.

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<http://bugs.python.org/issue7976>
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