try:

  ssh_client=paramiko.SSHClient()
  pk=paramiko.RSAKey.from_private_key_file(path)
  ssh_client.set_missing_host_key_policy(paramiko.AutoAddPolicy())
  ssh_client.connect(hostname=hostname, port=port, username=username, password=password,pkey=pk)
  ssh_stdin, ssh_stdout, ssh_stderr = ssh_client.exec_command(postgresquery)


  print('Tunnel connected')
  for line in ssh_stdout.readlines(): #terminal never get past this line of code. And is not either possible to terminate the script
      print(line)
  ssh_client.close()
except:
    print("Connection failed")