You can import os to allow access to some of the windows commands such as clear screen to clear the console. - First import os - at the top of your code with the other library imports.
Where you want to clear the screen - perhaps at the start of your definition
os.system("clear")
You need to consider how you use this though as it could make it so that you cannot see some of the results of commands you type - for example if you are using inventory the clear command might need to have a wait before it otherwise you will not be able to see the inventory.