Support Python 3.8 (#499)

Author: jakirkham

.travis.yml

@@ -30,6 +30,9 @@ matrix:
     - python: 3.7
       dist: xenial
       sudo: true
+    - python: 3.8
+      dist: xenial
+      sudo: true
 
 before_install:
   - docker pull arafato/azurite

appveyor.yml

@@ -27,6 +27,9 @@ environment:
     - PYTHON: "C:\\Python37-x64"
       PYTHON_VERSION: "3.7"
 
+    - PYTHON: "C:\\Python38-x64"
+      PYTHON_VERSION: "3.8"
+
 install:
   - "SET PATH=%PYTHON%;%PYTHON%\\Scripts;%PATH%"
   - "%CMD_IN_ENV% python -m pip install -U pip setuptools wheel"

docs/contributing.rst

@@ -90,7 +90,7 @@ you have cloned the Zarr source code and your current working directory is the r
 the repository, you can do something like the following::
 
     $ mkdir -p ~/pyenv/zarr-dev
-    $ virtualenv --no-site-packages --python=/usr/bin/python3.7 ~/pyenv/zarr-dev
+    $ virtualenv --no-site-packages --python=/usr/bin/python3.8 ~/pyenv/zarr-dev
     $ source ~/pyenv/zarr-dev/bin/activate
     $ pip install -r requirements_dev_minimal.txt -r requirements_dev_numpy.txt
     $ pip install -e .
@@ -190,8 +190,8 @@ Test coverage
 ~~~~~~~~~~~~~
 
 Zarr maintains 100% test coverage under the latest Python stable release (currently
-Python 3.6). Both unit tests and docstring doctests are included when computing
-coverage. Running ``tox -e py36`` will automatically run the test suite with coverage
+Python 3.8). Both unit tests and docstring doctests are included when computing
+coverage. Running ``tox -e py38`` will automatically run the test suite with coverage
 and produce a coverage report. This should be 100% before code can be accepted into the
 main code base.
 
@@ -206,7 +206,7 @@ Docstrings for user-facing classes and functions should follow the
 `numpydoc
 <https://github.com/numpy/numpy/blob/master/doc/HOWTO_DOCUMENT.rst.txt>`_
 standard, including sections for Parameters and Examples. All examples
-should run and pass as doctests under Python 3.7. To run doctests,
+should run and pass as doctests under Python 3.8. To run doctests,
 activate your development environment, install optional requirements,
 and run::
 

docs/release.rst

@@ -37,6 +37,9 @@ Upcoming Release
 * Require Numcodecs 0.6.4+ to use text handling functionality from it.
   By :user:`John Kirkham <jakirkham>`; :issue:`497`.
 
+* Support Python 3.8.
+  By :user:`John Kirkham <jakirkham>`; :issue:`499`.
+
 * Use ``math.ceil`` for scalars.
   By :user:`John Kirkham <jakirkham>`; :issue:`500`.
 

setup.py

@@ -47,6 +47,7 @@
         'Programming Language :: Python :: 3.5',
         'Programming Language :: Python :: 3.6',
         'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
     ],
     maintainer='Alistair Miles',
     maintainer_email='[email protected]',

tox.ini

@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py35, py36, py37-npy{115,116,latest}, docs
+envlist = py35, py36, py37-npy{115,116,latest}, py38, docs
 
 [testenv]
 install_command = pip install --no-binary=numcodecs {opts} {packages}
@@ -18,23 +18,23 @@ 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
-    py35,py36: pytest -v --cov=zarr --cov-config=.coveragerc zarr
+    py35,py36,py38: pytest -v --cov=zarr --cov-config=.coveragerc zarr
     # don't collect coverage when running older numpy versions
     py37-{npy115,npy116}: 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
-    py35,py36,py37-npylatest: coverage report -m
+    py35,py36,py37-npylatest,py38: coverage report -m
     # run doctests in the tutorial and spec
-    py37-npylatest: python -m doctest -o NORMALIZE_WHITESPACE -o ELLIPSIS docs/tutorial.rst docs/spec/v2.rst
+    py38: python -m doctest -o NORMALIZE_WHITESPACE -o ELLIPSIS docs/tutorial.rst docs/spec/v2.rst
     # pep8 checks
-    py37-npylatest: flake8 zarr
+    py38: flake8 zarr
     # print environment for debugging
     pip freeze
 deps =
     py37-npy115: numpy==1.15.4
     py37-npy116: numpy==1.16.4
-    py35,py36,py37-npylatest: -rrequirements_dev_numpy.txt
+    py35,py36,py37-npylatest,py38: -rrequirements_dev_numpy.txt
     -rrequirements_dev_minimal.txt
     -rrequirements_dev_optional.txt