Curses: Character in bottom right corner

[Gerrit Holl]

Hello,

can someone explain me why the following doesn't work:

--- *** ---
#!/usr/bin/python

import curses

def main(stdscr):
    maxy, maxx = stdscr.getmaxyx()
    stdscr.addstr(maxy-1, maxx-1, "s", curses.A_NORMAL)
    stdscr.refresh()

if __name__ == '__main__':
    import curses, traceback
    try:
        stdscr=curses.initscr()
        curses.noecho()
        curses.cbreak()

        stdscr.keypad(1)
        main(stdscr)                    # Enter the main loop

        stdscr.keypad(0)
        curses.echo()
        curses.nocbreak()
        curses.endwin()                 # Terminate curses
    except:
        stdscr.keypad(0)
        curses.echo() ; curses.nocbreak()
        curses.endwin()
        traceback.print_exc()           # Print the exception
--- *** ---

I'm getting this error:

17:05:23:192/693:gerrit at gerrit:~/oefen/python/ncurses$ python test.py
Traceback (innermost last):
  File "test.py", line 18, in ?
    main(stdscr)                    # Enter the main loop
  File "test.py", line 7, in main
    stdscr.addstr(maxy-1, maxx-1, "s", curses.A_NORMAL)
error: [mv]waddstr() returned ERR

It seems that he thinks it falls of the screen, but if I make either x or
y smaller (not both!) it does work, so if I change line 7 to something like
follows, it works.

    stdscr.addstr(maxy-2, maxx-1, "s", curses.A_NORMAL)
    stdscr.addstr(maxy-1, maxx-2, "s", curses.A_NORMAL)

What am I doing wrong?

regards,
Gerrit.