I am writing a front end for a server application using the curses module. THe main windows returned by curses is divided into 2 sub-windows. The top half of the screen prints output from the server while the bottom line takes input with window.getstr(). Sometimes when I am entering text and the top half is updating the whole screen goes crazy with random characters replacing the existing characters. Is there a specific cause for this or is it a curses bug?
I'm guessing you are using a thread to update the upper display while window.getstr() runs in the main thread?
If so, the problem is that the curses terminal state is a shared resource that can't be updated from two different threads simultaneously. You need to put the terminal into non-blocking mode, use window.getch() to build up an input string and have your thread pass the upper window update task to the main thread.
来源：https://stackoverflow.com/questions/8569878/curses-in-python-getstr-while-refreshing