Bump minimum NumPy version to 1.20 (#988)

* Bump minimum NumPy version to 1.20

* NumPy 1.20 support Python3.9

* mypy: added a "type: ignore"

Co-authored-by: jakirkham <jakirkham@gmail.com>

Author: madsbk

.github/workflows/python-package.yml

@@ -16,12 +16,10 @@ jobs:
     strategy:
       matrix:
         python-version: ['3.7', '3.8', '3.9', '3.10']
-        numpy_version: ['!=1.21.0', '==1.17.*']
+        numpy_version: ['>=1.22.0', '==1.20.*']
         exclude:
-          - python-version: 3.9
-            numpy_version: '==1.17.*'
           - python-version: '3.10'
-            numpy_version: '==1.17.*'
+            numpy_version: '==1.20.*'
     services:
       redis:
         image: redis
@@ -39,7 +37,7 @@ jobs:
           - 27017:27017
     steps:
     - uses: actions/checkout@v2
-      with: 
+      with:
         fetch-depth: 0
     - name: Setup Miniconda
       uses: conda-incubator/setup-miniconda@master
@@ -66,7 +64,7 @@ jobs:
         python -m pip freeze
     - name: Tests
       shell: "bash -l {0}"
-      env: 
+      env:
         COVERAGE_FILE: .coverage.${{matrix.python-version}}.${{matrix.numpy_version}}
         ZARR_TEST_ABS: 1
         ZARR_TEST_MONGO: 1
@@ -92,4 +90,4 @@ jobs:
         flake8 zarr
         mypy zarr
 
-    
+

tox.ini

@@ -4,7 +4,7 @@
 # and then run "tox" from this directory.
 
 [tox]
-envlist = py37-npy{117,latest}, py38, py39, docs
+envlist = py37-npy{120,latest}, py38, py39, docs
 
 [testenv]
 install_command = pip install --no-binary=numcodecs {opts} {packages}
@@ -21,7 +21,7 @@ commands =
     # main unit test runner
     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
+    py37-npy120: 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
@@ -33,7 +33,7 @@ commands =
     # print environment for debugging
     pip freeze
 deps =
-    py37-npy117: numpy==1.17.*
+    py37-npy120: numpy==1.20.*
     py37-npylatest,py38: -rrequirements_dev_numpy.txt
     -rrequirements_dev_minimal.txt
     -rrequirements_dev_optional.txt

zarr/meta.py

@@ -237,8 +237,8 @@ def decode_fill_value(
                 return np.array(v, dtype=dtype)[()]
         elif dtype.kind in "c":
             v = (
-                cls.decode_fill_value(v[0], dtype.type().real.dtype),
-                cls.decode_fill_value(v[1], dtype.type().imag.dtype),
+                cls.decode_fill_value(v[0], dtype.type().real.dtype),  # type: ignore
+                cls.decode_fill_value(v[1], dtype.type().imag.dtype),  # type: ignore
             )
             v = v[0] + 1j * v[1]
             return np.array(v, dtype=dtype)[()]