Drop Python 3.6

.github/workflows/weekly.yml

@@ -6,7 +6,7 @@ on:
   workflow_dispatch:
 
 jobs:
-  environment:
+  weekly:
     runs-on: ${{ matrix.os }}-latest
     strategy:
       max-parallel: 5
@@ -23,10 +23,6 @@ jobs:
           - os: ubuntu
             python: 3.9
             extras: -minimal
-# python-eccodes removed old versions from conda-forge
-#          - os: ubuntu
-#            python: 3.6
-#            extras: -minver
 
     steps:
     - uses: actions/checkout@v2
@@ -42,7 +38,7 @@ jobs:
         conda env export --no-build -f tests/environment-${{ matrix.os }}-${{ matrix.python }}${{ matrix.extras }}.yml
         git diff
     - name: Archive environment-${{ matrix.os }}-${{ matrix.python }}${{ matrix.extras }}.yml
-      uses: actions/upload-artifact@v2
+      uses: actions/upload-artifact@v3
       with:
         name: environment-${{ matrix.os }}-${{ matrix.python }}${{ matrix.extras }}.yml
         path: tests/environment-${{ matrix.os }}-${{ matrix.python }}${{ matrix.extras }}.yml

CONTRIBUTING.rst

@@ -52,7 +52,7 @@ you already have `virtualenv` and `Git` installed and ready to go.
     $ git clone https://github.com/YOUR_NAME/cfgrib.git
     $ cd cfgrib
 
-3. Assuming you have virtualenv installed (If you have Python3.5 this should already be there), you can create a new environment for your local development by typing::
+3. Assuming you have virtualenv installed, you can create a new environment for your local development by typing::
 
     $ virtualenv ../cfgrib-env
     $ source ../cfgrib-env/bin/activate
@@ -101,7 +101,7 @@ Before you submit a pull request, check that it meets these guidelines:
    your new functionality into a function with a docstring, and add the
    feature to the list in README.rst.
 
-3. The pull request should work for Python 2.7, 3.5, 3.6 and 3.7, and for PyPy2 and Pypy3. Check
+3. The pull request should work for all supported versions of Python, including PyPy3. Check
    the tox results and make sure that the tests pass for all supported Python versions.
 
 

ci/requirements-docs.yml

@@ -7,7 +7,6 @@ dependencies:
   - eccodes
   - future
   - nomkl
-  - python=3.6
   - sphinx
   - xarray
 

docs/index.rst

@@ -20,7 +20,7 @@ Features with development status **Beta**:
 
 - enables the ``engine='cfgrib'`` option to read GRIB files with *xarray*,
 - reads most GRIB 1 and 2 files including heterogeneous ones with ``cfgrib.open_datasets``,
-- supports all modern versions of Python 3.7, 3.6, 3.5 and PyPy3,
+- supports all modern versions of Python and PyPy3,
 - the 0.9.6.x series with support for Python 2 will stay active and receive critical bugfixes,
 - works on *Linux*, *MacOS* and *Windows*, the *ecCodes* C-library is the only binary dependency,
 - conda-forge package on all supported platforms,
@@ -56,4 +56,4 @@ Limitations:
     cfmessage
     dataset
     xarray_store
-    xarray_to_grib
+    xarray_to_grib

setup.py

@@ -48,7 +48,7 @@ def parse_version_from(path: str) -> str:
     packages=setuptools.find_packages(),
     include_package_data=True,
     install_requires=["attrs>=19.2", "click", "eccodes>=0.9.8", "numpy"],
-    python_requires=">=3.6",
+    python_requires=">=3.7",
     extras_require={
         "xarray": ["xarray>=0.15"],
         "tests": ["dask[array]", "flake8", "pytest", "pytest-cov", "scipy", "xarray>=0.15"],
@@ -60,7 +60,6 @@ def parse_version_from(path: str) -> str:
         "Intended Audience :: Developers",
         "License :: OSI Approved :: Apache Software License",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
         "Programming Language :: Python :: 3.8",
         "Programming Language :: Python :: 3.9",

tests/test_20_cfcoords.py

@@ -141,7 +141,6 @@ def test_translate_coords(da1: xr.Dataset, da2: xr.Dataset, da3: xr.Dataset) ->
     assert "longitude" in res.coords
 
 
-@pytest.mark.skipif(sys.version_info < (3, 6), reason="test needs stable dict's")
 def test_translate_coords_errors(da3: xr.Dataset) -> None:
     cfcoords.translate_coords(da3)
     cfcoords.translate_coords(da3, errors="ignore")

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist = qc, docs, py37, py36, py35, pypy3, deps
+envlist = qc, docs, py37, pypy3, deps
 
 [testenv]
 passenv = WHEELHOUSE PIP_FIND_LINKS PIP_WHEEL_DIR PIP_INDEX_URL
@@ -12,7 +12,7 @@ deps = -r{toxinidir}/ci/requirements-docs.txt
 commands = sphinx-build -W -b html docs build/sphinx/html
 
 [testenv:qc]
-basepython = python3.6
+basepython = python3.7
 # needed for pytest-cov
 usedevelop = true
 commands = pytest -v --flakes --pep8 --mccabe --cov=cfgrib --cov=cf2cdm --doctest-glob="*.rst" --cov-report=html --cache-clear --basetemp={envtmpdir} {posargs}