[issue17487] wave.Wave_read.getparams should be more user friendly

[Claudiu.Popa]

Claudiu.Popa added the comment:

There is a regression with the latest patch, `getparams` output is no longer picklable. The attached patch fixes this issue. Also, I renamed the internal namedtuple to something more meaningful.

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Added file: http://bugs.python.org/file30245/wave_picklable.patch

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