Examples: close the event loop at exit

examples/cachesvr.py

@@ -238,7 +238,10 @@ def main():
     svr = loop.run_until_complete(task)
     for sock in svr.sockets:
         logging.info('socket %s', sock.getsockname())
+    try:
         loop.run_forever()
+    finally:
+        loop.close()
 
 
 if __name__ == '__main__':

examples/echo_client_tulip.py

@@ -17,3 +17,4 @@ def echo_client():
 
 loop = asyncio.get_event_loop()
 loop.run_until_complete(echo_client())
+loop.close()

examples/echo_server_tulip.py

@@ -14,4 +14,7 @@ def handle_connection(reader, writer):
 
 loop = asyncio.get_event_loop()
 loop.run_until_complete(echo_server())
+try:
     loop.run_forever()
+finally:
+    loop.close()

examples/hello_callback.py

@@ -11,4 +11,7 @@ def print_and_repeat(loop):
 if __name__ == '__main__':
     loop = asyncio.get_event_loop()
     print_and_repeat(loop)
+    try:
         loop.run_forever()
+    finally:
+        loop.close()

examples/hello_coroutine.py

@@ -12,4 +12,7 @@ def greet_every_two_seconds():
 
 if __name__ == '__main__':
     loop = asyncio.get_event_loop()
+    try:
         loop.run_until_complete(greet_every_two_seconds())
+    finally:
+        loop.close()

examples/shell.py

@@ -47,3 +47,4 @@ loop = asyncio.get_event_loop()
 loop.run_until_complete(cat(loop))
 loop.run_until_complete(ls(loop))
 loop.run_until_complete(test_call("bash", "-c", "sleep 3", timeout=1.0))
+loop.close()

examples/stacks.py

@@ -33,6 +33,7 @@ def doit():
     finally:
         for t in Task.all_tasks():
             t.print_stack()
+    l.close()
 
 
 def main():

examples/subprocess_attach_read_pipe.py

@@ -30,3 +30,4 @@ def task():
     print("read = %r" % data.decode())
 
 loop.run_until_complete(task())
+loop.close()

examples/subprocess_attach_write_pipe.py

@@ -29,5 +29,7 @@ def task():
 
     stdout, stderr = yield from proc.communicate()
     print("stdout = %r" % stdout.decode())
+    pipe.close()
 
 loop.run_until_complete(task())
+loop.close()

examples/subprocess_shell.py

@@ -80,6 +80,7 @@ def main():
         loop = asyncio.get_event_loop()
     loop.run_until_complete(start(
         'sleep 2; wc', input=[b'foo bar baz\n'*300 for i in range(100)]))
+    loop.close()
 
 
 if __name__ == '__main__':