Also except BlockingIOError on TcpClient.send()

telethon/extensions/tcp_client.py

@@ -53,12 +53,16 @@ class TcpClient:
             view = memoryview(data)
             total_sent, total = 0, len(data)
             while total_sent < total:
+                try:
                     sent = self._socket.send(view[total_sent:])
                     if sent == 0:
                         raise ConnectionResetError(
                             'The server has closed the connection.')
                     total_sent += sent
 
+                except BlockingIOError:
+                    time.sleep(self.delay)
+
     def read(self, size, timeout=timedelta(seconds=5)):
         """Reads (receives) a whole block of 'size bytes
            from the connected peer.