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[WIP] - Python 3.9 compatibility #4234

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[WIP] - Python 3.9 compatibility #4234

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2c48227
Python 3.9 compatibility
jcrist Nov 10, 2020
58742a6
Merge branch 'master' of github.com:dask/distributed into python39
mrocklin Jan 25, 2021
ef5bd0f
import multiprocessing
mrocklin Jan 25, 2021
60eecf8
Add Python 3.9 to CI
mrocklin Jan 25, 2021
236f8af
Update tornado install
jrbourbeau Jan 26, 2021
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8 changes: 4 additions & 4 deletions .github/workflows/ci-windows.yaml
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Original file line number Diff line number Diff line change
Expand Up @@ -8,7 +8,7 @@ jobs:
strategy:
fail-fast: false
matrix:
python-version: ["3.6", "3.7", "3.8"]
python-version: ["3.6", "3.7", "3.8", "3.9"]

steps:
- name: Checkout source
Expand All @@ -33,10 +33,10 @@ jobs:
- name: Install tornado
shell: bash -l {0}
run: |
if [[ "${{ matrix.python-version }}" = "3.8" ]]; then
conda install -c conda-forge tornado=6
else
if [[ "${{ matrix.python-version }}" = "3.6" ]]; then
conda install -c conda-forge tornado=5
else
conda install -c conda-forge tornado=6
fi

- name: Install distributed from source
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8 changes: 7 additions & 1 deletion distributed/utils.py
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Expand Up @@ -10,7 +10,7 @@
import html
import json
import logging
import multiprocessing
import multiprocessing # noqa: F401
import os
import re
import shutil
Expand Down Expand Up @@ -71,6 +71,12 @@


def _initialize_mp_context():
import multiprocessing # noqa: F401

if not WINDOWS:
# For some reason this is required in python >= 3.9
import multiprocessing.popen_spawn_posix

if WINDOWS or PYPY:
return multiprocessing
else:
Expand Down