clear screen for a new command

[Óscar Aquiles Caldas Villanueva]

I want to clear the screen of the 3270 emulator so I can execute a new command. I have tried with exec_commad(b'clear) but it doesn't work (Keyboard lockedOperator error). When I use vb6 I clear the screen with: autECLSession.autECLPS.SendKeys "[clear]" and when it is from the IBM emulator it is the pause/break key. With the py3270 library, is there an option?