bpo-35283: Add deprecation warning for Thread.isAlive (GH-11454)

Add a deprecated warning for the threading.Thread.isAlive() method.

2 files changed, 4 insertions, 3 deletions

diff --git a/Lib/test/support/__init__.py b/Lib/test/support/__init__.py
index dd1790d..697182e 100644
--- a/Lib/test/support/__init__.py
+++ b/Lib/test/support/__init__.py
@@ -2264,14 +2264,14 @@ def start_threads(threads, unlock=None):
                 endtime += 60
                 for t in started:
                     t.join(max(endtime - time.monotonic(), 0.01))
-                started = [t for t in started if t.isAlive()]
+                started = [t for t in started if t.is_alive()]
                 if not started:
                     break
                 if verbose:
                     print('Unable to join %d threads during a period of '
                           '%d minutes' % (len(started), timeout))
         finally:
-            started = [t for t in started if t.isAlive()]
+            started = [t for t in started if t.is_alive()]
             if started:
                 faulthandler.dump_traceback(sys.stdout)
                 raise AssertionError('Unable to join %d threads' % len(started))
diff --git a/Lib/test/test_threading.py b/Lib/test/test_threading.py
index 8160a5a..af2d6b5 100644
--- a/Lib/test/test_threading.py
+++ b/Lib/test/test_threading.py
@@ -415,7 +415,8 @@ class ThreadTests(BaseTestCase):
         t.setDaemon(True)
         t.getName()
         t.setName("name")
-        t.isAlive()
+        with self.assertWarnsRegex(DeprecationWarning, 'use is_alive()'):
+            t.isAlive()
         e = threading.Event()
         e.isSet()
         threading.activeCount()