Don't do anything on .connect() if it's already connected

telethon/network/mtproto_sender.py

@@ -35,6 +35,9 @@ class MtProtoSender:
         """Connects to the server"""
         self._transport.connect()
 
+    def is_connected(self):
+        return self._transport.is_connected()
+
     def disconnect(self):
         """Disconnects from the server"""
         self._transport.close()

telethon/network/tcp_transport.py

@@ -18,6 +18,9 @@ class TcpTransport:
         self.send_counter = 0
         self.tcp_client.connect(self.ip, self.port)
 
+    def is_connected(self):
+        return self.tcp_client.connected
+
     # Original reference: https://core.telegram.org/mtproto#tcp-transport
     # The packets are encoded as: total length, sequence number, packet and checksum (CRC32)
     def send(self, packet):