old_contents: #!/usr/bin/env python
  import socket
  
  
  def main():
      server_socket = socket.socket(socket.AF_INET, socket.SOCK_STREAM,
                                    socket.IPPROTO_IP)
      server_socket.bind(('127.0.0.1', 50000))
      server_socket.listen(1)
      conn, addr = server_socket.accept()
      msg = conn.recv(1024)
      conn.sendall(msg)
      conn.shutdown(socket.SHUT_WR)
      conn.close()
  
  if __name__ == '__main__':
      main()
  
new_contents: #!/usr/bin/env python
  import socket
  
  
  def main():
      server_socket = socket.socket(
          socket.AF_INET,
          socket.SOCK_STREAM,
          socket.IPPROTO_IP)
      server_socket.bind(('127.0.0.1', 50000))
      server_socket.listen(1)
      conn, addr = server_socket.accept()
      msg = conn.recv(1024)
      conn.sendall(msg)
      conn.shutdown(socket.SHUT_WR)
      conn.close()
  
  if __name__ == '__main__':
      main()
  
subject: Change format to satify pedantic linter