Python3 curses behavior

[Vlasov Vitaly]

Hello.

I found strange behavior of curses module, that i can't understand. I initialize screen with curses.initscr(), then i create subwin of screen with screen.subwin(my_subwin_sizes). After that i fill subwin with my_char in for-loop. On last char in last line subwin.addch() raises exception.

This is my problem. Why? How to fix it?

(If i will ignore exception, then last char will be displayed)

Here simple example:
http://pastebin.com/SjyMsHZB

Thank You!