bpo-43723: Fix deprecation error caused by thread.setDaemon() (GH-25361)

Lib/test/test_asyncio/test_streams.py

@@ -799,7 +799,7 @@ os.close(fd)
 
         # Start the server thread and wait for it to be listening.
         thread = threading.Thread(target=server)
-        thread.setDaemon(True)
+        thread.daemon = True
         thread.start()
         addr = q.get()
 

Lib/test/test_logging.py

@@ -849,7 +849,7 @@ class TestSMTPServer(smtpd.SMTPServer):
         """
         self._thread = t = threading.Thread(target=self.serve_forever,
                                             args=(self.poll_interval,))
-        t.setDaemon(True)
+        t.daemon = True
         t.start()
 
     def serve_forever(self, poll_interval):
@@ -901,7 +901,7 @@ class ControlMixin(object):
         """
         self._thread = t = threading.Thread(target=self.serve_forever,
                                             args=(self.poll_interval,))
-        t.setDaemon(True)
+        t.daemon = True
         t.start()
 
     def serve_forever(self, poll_interval):

Lib/test/test_telnetlib.py

@@ -29,7 +29,7 @@ class GeneralTests(unittest.TestCase):
         self.sock.settimeout(60)  # Safety net. Look issue 11812
         self.port = socket_helper.bind_port(self.sock)
         self.thread = threading.Thread(target=server, args=(self.evt,self.sock))
-        self.thread.setDaemon(True)
+        self.thread.daemon = True
         self.thread.start()
         self.evt.wait()
 

Tools/ccbench/ccbench.py

@@ -221,7 +221,7 @@ def run_throughput_test(func, args, nthreads):
     for i in range(nthreads):
         threads.append(threading.Thread(target=run))
     for t in threads:
-        t.setDaemon(True)
+        t.daemon = True
         t.start()
     # We don't want measurements to include thread startup overhead,
     # so we arrange for timing to start after all threads are ready.
@@ -328,7 +328,7 @@ def run_latency_test(func, args, nthreads):
         for i in range(nthreads):
             threads.append(threading.Thread(target=run))
         for t in threads:
-            t.setDaemon(True)
+            t.daemon = True
             t.start()
         # Wait for threads to be ready
         with ready_cond:
@@ -460,7 +460,7 @@ def run_bandwidth_test(func, args, nthreads):
             for i in range(nthreads):
                 threads.append(threading.Thread(target=run))
             for t in threads:
-                t.setDaemon(True)
+                t.daemon = True
                 t.start()
             # Wait for threads to be ready
             with ready_cond: