Martin Panter added the comment:

Remember that you probably should not mention “xztar” in the 3.4 or 2.7 docs 
(even though “lzma” exists in 3.4).

I am not too familiar with using shutil or zipfile, but it seems like 
extraction of some zip files is always possible, even if zlib (for Deflate) 
isn’t available (e.g. for zip files that are not compressed, or use bzip2 or 
LZMA). Maybe you should only make zip file _creation_ conditional.

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nosy: +martin.panter

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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue14061>
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