use asyncio.run() in examples

calling `asyncio.get_running_loop()` will fail if there is no running event loop, so we should use `asyncio.run()` instead to create a new loop.

Also, use events for infinite waiting instead of futures since there is no return value.

README.md

@@ -78,8 +78,6 @@ from dbus_fast.aio import MessageBus
 
 import asyncio
 
-loop = asyncio.get_running_loop()
-
 
 async def main():
     bus = await MessageBus().connect()
@@ -106,9 +104,9 @@ async def main():
 
     properties.on_properties_changed(on_properties_changed)
 
-    await loop.create_future()
+    await asyncio.Event().wait()
 
-loop.run_until_complete(main())
+asyncio.run(main())
 ```
 
 ## The Service Interface
@@ -159,9 +157,9 @@ async def main():
     # now that we are ready to handle requests, we can request name from D-Bus
     await bus.request_name('test.name')
     # wait indefinitely
-    await asyncio.get_running_loop().create_future()
+    await asyncio.Event().wait()
 
-asyncio.get_running_loop().run_until_complete(main())
+asyncio.run(main())
 ```
 
 ## The Low-Level Interface
@@ -177,8 +175,6 @@ from dbus_fast.aio import MessageBus
 import asyncio
 import json
 
-loop = asyncio.get_running_loop()
-
 
 async def main():
     bus = await MessageBus().connect()
@@ -195,7 +191,7 @@ async def main():
     print(json.dumps(reply.body[0], indent=2))
 
 
-loop.run_until_complete(main())
+asyncio.run(main())
 ```
 
 ## Projects that use python-dbus-fast

docs/source/high-level-service/index.rst

@@ -90,4 +90,4 @@ If any file descriptors are sent or received (DBus type ``h``), the variable ref
 
         await bus.wait_for_disconnect()
 
-    asyncio.get_running_loop().run_until_complete(main())
+    asyncio.run(main())

examples/aio-list-names.py

@@ -10,8 +10,6 @@ import json
 from dbus_fast import Message, MessageType
 from dbus_fast.aio import MessageBus
 
-loop = asyncio.get_running_loop()
-
 
 async def main():
     bus = await MessageBus().connect()
@@ -31,4 +29,4 @@ async def main():
     print(json.dumps(reply.body[0], indent=2))
 
 
-loop.run_until_complete(main())
+asyncio.run(main())

examples/aio-tcp-notification.py

@@ -17,8 +17,6 @@ import asyncio
 
 from dbus_fast.aio import MessageBus
 
-loop = asyncio.get_running_loop()
-
 
 async def main():
     bus = await MessageBus(bus_address="tcp:host=127.0.0.1,port=55556").connect()
@@ -34,4 +32,4 @@ async def main():
     )
 
 
-loop.run_until_complete(main())
+asyncio.run(main())

examples/dbus-next-send.py

@@ -101,8 +101,6 @@ else:
     if not signature:
         exit_error("--signature is a required argument when passing a message body")
 
-loop = asyncio.get_running_loop()
-
 
 async def main():
     bus = await MessageBus(bus_type=bus_type).connect()
@@ -135,4 +133,4 @@ async def main():
     sys.exit(ret)
 
 
-loop.run_until_complete(main())
+asyncio.run(main())

examples/example-service.py

@@ -64,4 +64,4 @@ async def main():
     await bus.wait_for_disconnect()
 
 
-asyncio.get_running_loop().run_until_complete(main())
+asyncio.run(main())

examples/mpris.py

@@ -8,8 +8,6 @@ import asyncio
 
 from dbus_fast.aio import MessageBus
 
-loop = asyncio.get_running_loop()
-
 
 async def main():
     bus = await MessageBus().connect()
@@ -45,4 +43,4 @@ async def main():
     await bus.wait_for_disconnect()
 
 
-loop.run_until_complete(main())
+asyncio.run(main())