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Bug 1718390 - python3-uvloop fails to import with Python 3.8
Summary: python3-uvloop fails to import with Python 3.8
Keywords:
Status: CLOSED RAWHIDE
Alias: None
Product: Fedora
Classification: Fedora
Component: python-uvloop
Version: rawhide
Hardware: Unspecified
OS: Unspecified
unspecified
high
Target Milestone: ---
Assignee: Igor Raits
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard:
Depends On:
Blocks: PYTHON38
TreeView+ depends on / blocked
 
Reported: 2019-06-07 15:54 UTC by Petr Viktorin
Modified: 2019-07-10 15:13 UTC (History)
3 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
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Clone Of:
Environment:
Last Closed: 2019-07-10 15:13:42 UTC
Type: Bug
Embargoed:

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System ID Private Priority Status Summary Last Updated
Github MagicStack uvloop issues 251 0 None None None 2019-06-07 15:54:28 UTC

Description Petr Viktorin 2019-06-07 15:54:28 UTC 
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.
Comment 1 Miro Hrončok 2019-06-10 11:16:13 UTC 
This makes "python-ZEO" (which imports uvloop during tests) fail to build for Python 3.8.
Comment 2 Miro Hrončok 2019-06-10 14:05:41 UTC 
https://src.fedoraproject.org/rpms/python-uvloop/pull-request/1
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