[O] Optimize

telnet_ex.py

@@ -0,0 +1,35 @@
+import asyncio
+
+import telnetlib3
+from telnetlib3 import TelnetReaderUnicode, TelnetWriterUnicode
+
+
+async def shell(reader: TelnetReaderUnicode, writer: TelnetWriterUnicode):
+    # Handle input function
+    async def on_input(inp: str):
+        # Switch case
+        match inp:
+            case '\x1b[C' | 'd':  # Right
+                writer.write('Right pressed\r\n')
+            case '\x1b[D' | 'a':  # Left
+                writer.write('Left pressed\r\n')
+            case '\x1b' | 'q' | '\x03':  # Escape or q or Ctrl+C
+                writer.write('\r\nBye!\r\n')
+                writer.close()
+                return True
+            case _:
+                print(f'Unknown input: {repr(inp)}')
+
+    # Listen input
+    while True:
+        inp: str = await reader.read(3)
+        if inp and await on_input(inp):
+            return
+
+if __name__ == '__main__':
+    # Create a new event loop, start the server and wait for it to close
+    loop = asyncio.new_event_loop()
+    asyncio.set_event_loop(loop)
+    coro = telnetlib3.create_server(port=2323, shell=shell)
+    server = loop.run_until_complete(coro)
+    loop.run_until_complete(server.wait_closed())