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Update needed for Python 3.8

See original GitHub issue

Hi, A quick information, maybe will save a bit of time for someone.

The current version of uvloop (0.13.0) does not work at runtime with Python 3.8, it cannot be imported because it uses a method that was removed:

  File "uvloop/includes/stdlib.pxi", line 114, in init uvloop.loop
AttributeError: module 'sys' has no attribute 'set_coroutine_wrapper'

This was fixed in the last version of uvloop from GitHub (uvloop 0.14.0.dev0), so compiling from source is fine
However, it cannot be installed with uvicorn because of the requirement in its setup.py

ERROR: uvicorn 0.8.6 has requirement uvloop==0.12.*, but you'll have uvloop 0.14.0.dev0 which is incompatible.

In conclusion, to support Python 3.8 and install from PyPi, we need to wait for a new version of uvloop and a new version of uvicorn with updated dependency version.

Issue Analytics

State:
Created 4 years ago
Reactions:1
Comments:9 (6 by maintainers)

Top GitHub Comments

1reaction

gvbgduhcommented, Oct 19, 2019

It’s getting a bit complicated, there’s no published or tagged version which is 0.14.0dev. It sits in the master branch dated by Apr, 23 and the actual fix was a bit later. So, it takes an install from a certain commit that also requires bringing the Cython lib to the scope. I have a passing configuration in https://github.com/encode/uvicorn/pull/453. I might be missing a simpler way to approach it, but this one doesn’t look very nice. And I’m still having some difficulties to build it on macOS.

0reactions

tomchristiecommented, Nov 12, 2019

Absolutely, yup! https://github.com/encode/uvicorn/pull/485