为什么我不能将 addstr() 添加到 pythoncurses 窗口中的最后一行/列？

使用Python，我尝试使用addstr() 将光标位置写入curses 窗口的右下角，但出现错误。ScreenH-2工作正常，但打印在窗口底部的第二行。ScreenH-1根本不起作用。我究竟做错了什么？

import curses

ScreenH = 0
ScreenW = 0
CursorX = 1
CursorY = 1

def repaint(screen):   
   global ScreenH
   global ScreenW
   global CursorX
   global CursorY

   ScreenH, ScreenW = screen.getmaxyx()
   cloc = '   ' + str(CursorX) + ':' + str(CursorY) + ' '
   cloclen =  len (cloc)
   screen.addstr (ScreenH - 1, ScreenW - cloclen, cloc,  curses.color_pair(1));


def Main(screen):
   curses.init_pair (1, curses.COLOR_WHITE, curses.COLOR_BLUE)
   repaint (screen)   

   while True:
      ch = screen.getch()
      if ch == ord('q'):
         break

      repaint (screen)     


curses.wrapper(Main)

  File "test.py", line 17, in repaint
    screen.addstr (ScreenH - 1, ScreenW - cloclen, cloc,  curses.color_pair(1));
_curses.error: addstr() returned ERR

你也可以使用insstr代替addstr:

screen.insstr(ScreenH - 1, ScreenW - 1 - cloclen, cloc,  curses.color_pair(1))

这将阻止滚动，从而允许您打印到最后一行的最后一个字符