[issue25007] Add support of copy protocol to zlib compressors and decompressors

[Josh Rosenberg]

Josh Rosenberg added the comment:

Patch looks good, but incomplete. Supporting __deepcopy__ (as a simple wrapper around __copy__ that ignores the second argument) would provide complete support.

Also, should there be tests? I mean, I assume the .copy() method itself is tested, but just to detect stupid regressions, seems like testing __copy__/__deepcopy__ for identical behavior would be a good thing.

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nosy: +josh.r

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<http://bugs.python.org/issue25007>
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