Feature 'with client:' syntax in the examples

telethon_examples/print_updates.py

@@ -4,37 +4,33 @@
 # NOTE: To run this script you MUST have 'TG_API_ID' and 'TG_API_HASH' in
 #       your environment variables. This is a good way to use these private
 #       values. See https://superuser.com/q/284342.
-
-import asyncio
 from os import environ
 
-# environ is used to get API information from environment variables
-# You could also use a config file, pass them as arguments,
-# or even hardcode them (not recommended)
 from telethon import TelegramClient
 
 
-async def main():
-    session_name = environ.get('TG_SESSION', 'session')
-    client = TelegramClient(session_name,
-                            int(environ['TG_API_ID']),
-                            environ['TG_API_HASH'],
-                            proxy=None)
-
-    if 'TG_PHONE' in environ:
-        await client.start(phone=environ['TG_PHONE'])
-    else:
-        await client.start()
-
-    client.add_event_handler(update_handler)
-    print('(Press Ctrl+C to stop this)')
-    await client.disconnected
+client = TelegramClient(
+    environ.get('TG_SESSION', 'session'),
+    environ['TG_API_ID'],
+    environ['TG_API_HASH'],
+    proxy=None
+)
 
 
 async def update_handler(update):
     print(update)
 
 
-if __name__ == '__main__':
-    loop = asyncio.get_event_loop()
-    loop.run_until_complete(main())
+client.add_event_handler(update_handler)
+
+'''You could also have used the @client.on(...) syntax:
+from telethon import events
+
+@client.on(events.Raw)
+async def update_handler(update):
+    print(update)
+'''
+
+with client.start():
+    print('(Press Ctrl+C to stop this)')
+    client.run_until_disconnected()