how to run two python files at a same time on same lx terminal window

Question

i am developing a chatting system using python the ui is simple command line (lx terminal). the problem I am facing is I want a "type your message here>" input at the bottom of the terminal that remain unchanged throughout the program and the rest of the upper part continue to fetch new messages from database and refresh the screen but it should not affect the bottom input section where "type your message here>" is written.