Activate Python 3.9

.github/workflows/python-package.yml

@@ -15,8 +15,11 @@ jobs:
     runs-on: ubuntu-latest
     strategy:
       matrix:
-        python-version: [3.7, 3.8]
+        python-version: [3.7, 3.8, 3.9]
         numpy_version: ['!=1.21.0', '==1.17.*']
+        exclude:
+          - python-version: 3.9
+            numpy_version: '==1.17.*'
     services:
       redis:
         image: redis
@@ -47,7 +50,7 @@ jobs:
     - name: Create Conda environment with the rights deps
       shell: "bash -l {0}"
       run: |
-        conda create -n zarr-env python==${{matrix.python-version}} bsddb3 numcodecs==0.6.4 lmdb pip nodejs flake8 mypy
+        conda create -n zarr-env python==${{matrix.python-version}} bsddb3 numcodecs lmdb pip nodejs flake8 mypy
         conda activate zarr-env
         npm install -g azurite
     - name: Install dependencies

.github/workflows/windows-testing.yml

@@ -16,7 +16,7 @@ jobs:
     strategy:
       fail-fast: True
       matrix:
-        python-version: ["3.8"]
+        python-version: ["3.8", "3.9"]
     steps:
       - uses: actions/checkout@v2
         with:
@@ -31,7 +31,7 @@ jobs:
       - name: Create Conda environment with the rights deps
         shell: bash -l {0}
         run: |
-          conda create -n zarr-env python==${{matrix.python-version}} numcodecs==0.6.4 pip nodejs
+          conda create -n zarr-env python==${{matrix.python-version}} numcodecs pip nodejs
       - name: Install dependencies
         shell: bash -l {0}
         run: |

requirements_dev_minimal.txt

@@ -1,7 +1,7 @@
 # library requirements
 asciitree==0.3.3
 fasteners==0.16.3
-numcodecs==0.8.1
+numcodecs==0.9.1
 msgpack-python==0.5.6
 setuptools-scm==6.3.2
 # test requirements

tox.ini

@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py37-npy{117,latest}, py38, docs
+envlist = py37-npy{117,latest}, py38, py39, docs
 
 [testenv]
 install_command = pip install --no-binary=numcodecs {opts} {packages}
@@ -18,17 +18,17 @@ commands =
     # clear out any data files generated during tests
     python -c 'import glob; import shutil; import os; [(shutil.rmtree(d) if os.path.isdir(d) else os.remove(d) if os.path.isfile(d) else None) for d in glob.glob("./example*")]'
     # main unit test runner
-    py38: pytest -v --cov=zarr --cov-config=.coveragerc zarr
+    py{38,39}: pytest -v --cov=zarr --cov-config=.coveragerc zarr
     # don't collect coverage when running older numpy versions
     py37-npy117: pytest -v zarr
     # collect coverage and run doctests under py37
     py37-npylatest: pytest -v --cov=zarr --cov-config=.coveragerc --doctest-plus zarr --remote-data
     # generate a coverage report
-    py37-npylatest,py38: coverage report -m
+    py37-npylatest,py38,py39: coverage report -m
     # run doctests in the tutorial and spec
-    py38: python -m doctest -o NORMALIZE_WHITESPACE -o ELLIPSIS docs/tutorial.rst docs/spec/v2.rst
+    py{38,39}: python -m doctest -o NORMALIZE_WHITESPACE -o ELLIPSIS docs/tutorial.rst docs/spec/v2.rst
     # pep8 checks
-    py38: flake8 zarr
+    py{38,39}: flake8 zarr
     # print environment for debugging
     pip freeze
 deps =