Merge remote-tracking branch 'origin/master' into chore_githubactions

Author: xgui3783

setup.py

@@ -53,6 +53,8 @@ def find_version(*file_paths):
         "Programming Language :: Python :: 3.5",
         "Programming Language :: Python :: 3.6",
         "Programming Language :: Python :: 3.7",
+        "Programming Language :: Python :: 3.8",
+        "Programming Language :: Python :: 3.9",
         "Topic :: Scientific/Engineering :: Visualization",
     ],
     keywords="neuroimaging",

src/neuroglancer_scripts/downscaling.py

@@ -161,7 +161,7 @@ def downscale(self, chunk, downscaling_factors):
             raise NotImplementedError
         dtype = chunk.dtype
         # Use a floating-point type for arithmetic
-        work_dtype = np.promote_types(chunk.dtype, np.floating)
+        work_dtype = np.promote_types(chunk.dtype, np.float64)
         chunk = chunk.astype(work_dtype, casting="safe")
 
         half = work_dtype.type(0.5)

tox.ini

@@ -3,15 +3,22 @@
 # test suite on all supported python versions. To use it, "pip install tox"
 # and then run "tox" from this directory.
 
+# NOTE: remember to update the classifiers in setup.py when Python versions are
+# added/removed
+#
+# FIXME: Tests do not work on Python 3.10 yet as of 2021-10-15 beause the NumPy
+# wheels are not available from PyPI. py310 should be added when they become
+# available.
 [tox]
-envlist = py35, py36, py37, py38, codestyle, docs
+envlist = py35, py36, py37, py38, py39, codestyle, docs
 
 [gh-actions]
 python =
     3.5: py35
     3.6: py36
     3.7: py37
-    3.8: py38
+    3.8: py38, codestyle
+    3.9: py39
 
 [testenv]
 commands = pytest {posargs}