[issue17630] Create a pure Python zipfile importer

[Brett Cannon]

Brett Cannon added the comment:

This is going to need a touch-up for PEP 451 to make the whole thing work more smoothly, so repositioning for Python 3.5. When that happens I can look into the 2 second issue that Amaury pointed out and Paul's review.

Although I do wonder about the utility of this work. Zipimport still gets around the bootstrapping problem that any pure Python zip implementation never will. Probably the only hope of being useful is to make this abstract enough to include a pluggable (de)compression setup so that lzma or bz2 can be used on top of a single file storage back-end like tar or zip.

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versions: +Python 3.5 -Python 3.4

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