When built for Python 3.8.0b1, uvloop cannot be imported: >>> import uvloop Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/lib64/python3.8/site-packages/uvloop/__init__.py", line 7, in <module> from .loop import Loop as __BaseLoop # NOQA File "uvloop/includes/stdlib.pxi", line 114, in init uvloop.loop AttributeError: module 'sys' has no attribute 'set_coroutine_wrapper' The function "sys.set_coroutine_wrapper", which was added provisionally to Python 3.5, and deprecated in Python 3.7, is removed in Python 3.8. See upstream issue: https://github.com/MagicStack/uvloop/issues/251 This makes "python-sanic" (which imports uvloop during tests) fail to build for Python 3.8. For its build logs, see: https://copr-be.cloud.fedoraproject.org/results/@python/python3.8/fedora-rawhide-x86_64/00928223-python-sanic/ Testing and mass rebuild of packages is happening in copr. You can follow these instructions to test locally in mock if your package builds with Python 3.8: https://copr.fedorainfracloud.org/coprs/g/python/python3.8/ Let us know here if you have any questions.
This makes "python-ZEO" (which imports uvloop during tests) fail to build for Python 3.8.
https://src.fedoraproject.org/rpms/python-uvloop/pull-request/1