Backport PR #11962: Fix warnings with Python 3.10

.github/workflows/ci_cron_weekly.yml

@@ -29,10 +29,10 @@ jobs:
           # that gives too many false positives due to URL timeouts. We also
           # install all dependencies via pip here so we pick up the latest
           # releases.
-          - name: Python 3.7 with dev version of key dependencies
+          - name: Python 3.10 with dev version of key dependencies
             os: ubuntu-latest
-            python: 3.7
-            toxenv: py37-test-devdeps
+            python: '3.10.0-alpha - 3.10.0'
+            toxenv: py310-test-devdeps
 
           - name: Documentation link check
             os: ubuntu-latest

.github/workflows/ci_workflows.yml

@@ -58,6 +58,11 @@ jobs:
             python: 3.9
             toxenv: py39-test
 
+          - name: Python 3.10 with minimal dependencies
+            os: ubuntu-latest
+            python: '3.10.0-alpha - 3.10.0'
+            toxenv: py310-test-devdeps
+
           # NOTE: In the build below we also check that tests do not open and
           # leave open any files. This has a performance impact on running the
           # tests, hence why it is not enabled by default.

astropy/convolution/convolve.py

@@ -4,6 +4,7 @@
 
 import os
 import ctypes
+import warnings
 from functools import partial
 
 import numpy as np
@@ -22,7 +23,10 @@
 LIBRARY_PATH = os.path.dirname(__file__)
 
 try:
-    _convolve = load_library("_convolve", LIBRARY_PATH)
+    with warnings.catch_warnings():
+        # distutils.sysconfig module is deprecated in Python 3.10
+        warnings.simplefilter('ignore', DeprecationWarning)
+        _convolve = load_library("_convolve", LIBRARY_PATH)
 except Exception:
     raise ImportError("Convolution C extension is missing. Try re-building astropy.")
 

astropy/io/fits/util.py

@@ -210,9 +210,9 @@ def ignore_sigint(func):
     def wrapped(*args, **kwargs):
         # Get the name of the current thread and determine if this is a single
         # threaded application
-        curr_thread = threading.currentThread()
-        single_thread = (threading.activeCount() == 1 and
-                         curr_thread.getName() == 'MainThread')
+        curr_thread = threading.current_thread()
+        single_thread = (threading.active_count() == 1 and
+                         curr_thread.name == 'MainThread')
 
         class SigintHandler:
             def __init__(self):

astropy/tests/tests/test_imports.py

@@ -19,7 +19,7 @@ def onerror(name):
 
     for imper, nm, ispkg in pkgutil.walk_packages(['astropy'], 'astropy.',
                                                   onerror=onerror):
-        imper.find_module(nm)
+        imper.find_spec(nm)
 
 
 def test_toplevel_namespace():

astropy/utils/console.py

@@ -121,7 +121,7 @@ def isatty(file):
     ttys.
     """
     if (multiprocessing.current_process().name != 'MainProcess' or
-            threading.current_thread().getName() != 'MainThread'):
+            threading.current_thread().name != 'MainThread'):
         return False
 
     if hasattr(file, 'isatty'):

docs/changes/11962.other.rst

@@ -0,0 +1 @@
+Fix deprecation warnings with Python 3.10

tox.ini

@@ -1,6 +1,6 @@
 [tox]
 envlist =
-    py{37,38,39,dev}-test{,-alldeps,-oldestdeps,-devdeps,-numpy117,-numpy118,-numpy119}{,-cov}{,-clocale}
+    py{37,38,39,310,dev}-test{,-alldeps,-oldestdeps,-devdeps,-numpy117,-numpy118,-numpy119}{,-cov}{,-clocale}
     build_docs
     linkcheck
     codestyle