python-lz4 is currently under package review at [1]. Upstream python-lz4 bundles lz4[2] code directly in the package rather than using system lz4. There seems to be a few reasons for this:

(1) lz4 doesn't seem to be designed as a shared lib, so it's not currently possible to build against a system lz4.

(2) python-lz4 is tied to a specific lz4 release, since lz4 isn't meant as a shared lib so makes no API or ABI promises.

(3) In python-lz4 the lz4 code is changed/augmented to allow it to be compiled as a python extension module.

Could we have a bundling exception for python-lz4 ?

[1] https://bugzilla.redhat.com/show_bug.cgi?id=1236319
[2] https://github.com/Cyan4973/lz4