As an only semi-joke, I have created a module on GH that meets the needs of this discussion (using the spelling I think are most elegant):

On Sun, Jun 11, 2017 at 1:53 AM, Serhiy Storchaka <> wrote:
11.06.17 09:17, Neal Fultz пише:
   * other people have been false positive and wanted a SQL-type group by, but got burned
        * hence the warnings in the docs.

This wouldn't help if people don't read the docs.

Also, if someone rewrote zip in pure python, would many people actually notice a slow down vs network latency, disk IO,  etc?

Definitely yes.

RLE is a building block just like bisect.

This is very specific building block. And if ZIP compression be rewrote in pure Python it wouldn't use

FYI, there are multiple compression methods supported in ZIP files, but the zipmodule module implements not all of them. In particular simple RLE based methods are not implemented (they almost not used in real world now). I suppose that if the zipmodule module implements these algorithms it wouldn't use any general RLE implementation.

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